Kaifu katana, Shinshinto. Again, I appreciate any feedback. Thank you.

[Andrea Coltelli]

[Nukitsuke]

Hi,

 

it's a little hard to see from the photos, but I think I'm noticing some mokume patches along with areas of masame activities as well. The ji looks quite luminous and sparkly...  It would be nice to see clearer pictures of the Jigane to get a better sense of this work. 

If this is a recent purchase, congratulations, every acquisition teaches something and I hope this one teaches you a lot!

 

-Mitchell

[Andrea Coltelli]

Hello. Thank you for the reply. It has Mokume-Masame Jihada and

suguha-with-notare, nie-based temper extending almost to the habaki. Ichimonji-Kaeri boshi and dark active jinie-chikei in the steel. 

 I was able to zoom more into the photos. Nagasa is 101.5 cm. I thought that alone made it unusual. 

Edited Monday at 04:41 PM by Andrea Coltelli

[Nukitsuke]

Yeah, that sounds about right!  A 101.5 cm is kind of wild!  Usually I assume anything like that might have been a talisman sword or something dedicated to a shrine, but since I didn't see a mei, and due to the wear on the tsuka based on where the left hand should be... Also, the hi originating from the nakago, I assume this belonged to a very serious martial arts practicioner.  Something of this length probably has an awesome sounding tachi-kaze... lol You should test it out and report back lol, it looks like it would be really loud!

[Nihonto student]

Dear Mitchell,

 

first of all congratulations on your purchase. Are you sure about the nagasa measurement? Because in that case, it would be an ōdachi, not a katana; looking at the photos, it doesn't appear to me to be a 101 cm nagasa. Are you sure that measurement isn't the total length (including the nakago)?

 

 

Regards,

 

Giordy

[Nukitsuke]

Hi Giordy,  

I'm not sure of the measurements at all, as this is Andrea's blade. But you are correct that a nagasa of the length mentioned would be classified as an ōdachi. We can wait for Andrea to confirm the nagasa, and now that you've pointed it out, using the tsuba as a reference, it does kind of look to be shorter than 101... but, lol looks can be deceiving from time to time in photos. So Andrea would know best, and I guess we'll wait for confirmation!

Hopefully whoever sold Andrea the sword didn't mix up the measurements and accidentally misrepresent the blade.

 

-Mitchell

[Nihonto student]

Sorry Mitchell, obviously my post was meant for Andrea I mixed up names 

[Nukitsuke]

20 minutes ago, Nihonto student said:

Sorry Mitchell, obviously my post was meant for Andrea I mixed up names 

LOL No worries, Yes I figured. it was an opportunity for me to grow my post count... All the best!

 

-Mitchell

[Andrea Coltelli]

 

Hello. Thank you for the interest and sorry about the unintentional misrepresentation. It would be total length, although as I was trying to say it is still a considerable one. 
 

[Andrea Coltelli]

Hello. The Nagasa is 27.6”. I’m sorry I was doing too many things at once. 
 

here is what I put together so far:

 

Kaifu School Katana — Technical & Historical Record

NBTHK Attribution

School: Kaifu (海部)

Period: Shinshintō (1781–1876)

Province/Domain: Awa Province (modern Tokushima Prefecture, Shikoku) — Tokushima Domain under the Hachisuka clan

Classification: Wakimono (outside the five main traditions)

Historical Context

The Kaifu school's lineage dates to the Muromachi period. Under the Edo-period Hachisuka clan, Kaifu smiths served as official domain swordsmiths, producing robust, combat-oriented blades associated with Awa's coastal/maritime traditions (Kaifu-tō). Shinshintō-era Kaifu work is comparatively rare, often unsigned (mumei), and highly regarded by collectors.

This blade's style reflects the broader Fukko-tō (revivalist) movement of the Shinshintō period, in which smiths nationwide studied and recreated the aesthetic and technical qualities of Koto-period traditions — particularly Sōshū-den. This represents technical ambition and mastery on the part of the smith, in line with practices of the era.

Likely late-Edo Kaifu lineages capable of this level of work include the Ujiyoshi (氏吉) and Yasuyoshi (安吉) generations, both serving as official Hachisuka domain smiths through the Bunsei, Tenpo, and Ansei eras.

Technical Specifications (per NBTHK)

Motohaba (width at base)	27.8 mm
Motokasane (thickness at base)	7.8 mm
Sakihaba (width near tip)	18.9 mm
Sakikasane (thickness near tip)	5.2 mm
Blade weight	630 g
Zenchō (total length, blade + tsuka)	101.5 cm
Nagasa (blade length, per official Torōkushō)	70.1 cm
Sori (curvature, per official Torōkushō)	0.9 cm

Correction: earlier notes in this document treated 101.5 cm as the blade's nagasa and described the blade as approaching ōdachi-class proportions. The official Japanese sword registration certificate (Torōkushō, Tokyo Metropolitan Board of Education, registration no. Tokyo 329120) lists the blade's nagasa as 70.1 cm — a normal katana length — with the 101.5 cm figure representing zenchō, the total length including the tsuka (hilt). This correction affects the sugata and kissaki discussion further below; the blade should be understood as standard-length rather than unusually long.

 

Official Torōkushō (sword registration certificate), Tokyo Metropolitan Board of Education, with handwritten measurement card

Notable Physical Features (observed)

Blade (in polish)

● Jihada: mokume-hada with straight-running dark and bright lines (masame/chikei over a mokume base); steel shows a slightly bluish-gray cast, associated with well-refined tamahagane.

● Ji-nie / nioi: fine crystalline martensitic activity present along the hamon.

● Hamon: predominantly suguha (straight) with slight notare (gentle undulation).

● Hamon extends unusually close to the habaki: temper line visible roughly one inch below the habaki collar (activity near the machi).

● Boshi: ichimonji-kaeri (straight horizontal turnback) in the tip.

● Mune: deeper bevel near the tip, roughly 2 inches back from the point.

● Habaki: copper, double-stepped (nijū-habaki style).

Habaki close-up — engraved marks visible on the face

Kissaki and boshi, in polish

Blade surface detail — hira-ji, shinogi-ji, and bōhi

Full blade, two views — showing overall sugata, koshizori curvature, and copper habaki

Full blade, alternate view — sugata and nakago together

Blade surface detail, additional angle

Jihada macro close-up — mokume/masame grain pattern directly visible in the polished steel

Boshi macro close-up — turnback activity visible at the kissaki

Tang (nakago)

● Shape: V-shaped/tapering, with the bōhi rising higher on the ha (cutting-edge) side near the top — an asymmetric, deliberate finishing detail.

● Yasurime: kesho-yasurime combining horizontal (ichimonji) marks near the habaki with diagonal marks lower down, the diagonal strokes following the curvature of the tang's base.

● Mekugi-ana: single, pristine peg hole.

● Patina/rust pattern: light black rust (kuro-sabi) visible throughout the tang, notably under the horizontal file marks near the habaki and along the diagonal marks at the base. Deeper, darker rust concentrated near the mekugi-ana and along the cutting-edge side of the tang.

Nakago close-up — mekugi-ana, yasurime file marks, kurijiri shape, and patina, adjacent to the habaki

Nakago tip — full kurijiri (rounded-bottom) shape clearly visible

Interpretation

This combination — asymmetric bōhi finishing, double-stepped habaki, hamon activity reaching almost to the collar, and fine ji-nie/chikei work — indicates a blade finished as a showpiece rather than routine working stock, consistent with a senior smith's best effort for the Hachisuka domain rather than standard production. The rust/patina distribution on the tang (heavier near the mekugi-ana and cutting edge, lighter and following the file-mark topology elsewhere) is consistent with natural aging over roughly 150–200 years of handling, rather than an artificially induced patina — though this observation is descriptive, not a substitute for direct physical/microscopic examination by a specialist.

Important caveat: these features describe a high-quality, carefully made Kaifu-school blade. They do not, on their own, support attribution to an individual smith or to a school/tradition other than the one on the NBTHK paper (Kaifu, Shinshintō). Any such attribution would require either a signature or direct physical examination by a second qualified appraiser — not inference from written descriptions.

NBTHK Tokubetsu Hozon Eligibility (Policy Context)

Per NBTHK's published shinsa standards, mumei (unsigned) blades from the Muromachi and Edo periods are excluded from Tokubetsu Hozon "as a rule." The stated exception: if a blade is attributable to a specific, famous smith by name (not just a school/tradition) and is in excellent, unaltered condition, it may still qualify. Separately, shortened (suriage) Edo-period blades are excluded from Tokubetsu Hozon regardless of signature status.

How this applies here: this blade's NBTHK paper attributes it to the Kaifu school generally, not to a named individual smith — the normal and honest outcome for the large majority of mumei Shinshintō-era work. Under the current rule, this makes Hozon (which the blade already holds) the likely durable ceiling, rather than a stepping stone toward Tokubetsu Hozon. The only realistic path upward would be a future shinsa panel attributing the blade to a specific named Kaifu smith (e.g., a particular Ujiyoshi or Yasuyoshi generation) — and even then, condition/suriage status would still need to qualify.

This is a structural point about the certification system, not a reflection on the blade's actual quality — the features documented above (jihada, hamon activity, tang finishing) remain genuinely notable regardless of which paper tier is achievable.

Koshirae (Mountings) — As Currently Assembled

Tsuka (Hilt)

● Same (rayskin): dark, naturally aged tone — consistent with genuine long-term handling rather than a modern or artificially treated reproduction.

● Tsukaito (wrap lacing): golden-brown, bleached and grease-worn — a wear pattern typical of a hilt with real handling history rather than a display-only mounting.

● Menuki: grayish-brown with dark black striations, rounded/elongated, bone-like in appearance; reportedly copper. Likely shakudō (a copper-gold alloy) with a matured dark patina, which often reads as bone-like gray-brown rather than bright metallic once aged. The simple, rounded, non-figural form is consistent with a practical/battle-oriented mounting and with provincial/domain-smith stylistic restraint rather than an ornate courtly commission.

Tsukaito wrap detail — menuki visible beneath the lacing, fuchi edge at right

Kashira and tsukaito wrap, alternate angle

Full tsuka, sharp focus — kashira to fuchi, with menuki clearly visible under the wrap

Kashira, sharp close-up — stippled gilt-bronze texture

Menuki, sharp close-up

Note: this sharper image shows the menuki with a more gold/brass-toned surface than the grayish-brown, bone-like appearance described earlier in this record. This may be a function of lighting/exposure in this particular photo rather than a change in the piece itself, but it's logged here as an observation worth reconciling — the earlier shakudō identification should be treated as provisional pending in-hand review under consistent lighting.

Tsuba (Original Mounting — Being Replaced)

Correction: earlier notes in this document identified this tsuba's design as a Daikokuten/Ebisu (Shichifukujin) pairing. Direct photo review shows this was a misidentification — the actual design is a two-figure narrative/genre scene, corrected below. This tsuba is also being retired from the koshirae in favor of the candidate iron tsuba documented later in this section (see "Replacement Status").

● Material: copper, heavily oxidized black with deep, even patina.

● Sukashi (openwork) design depicting two human figures in a narrative scene rather than a Shichifukujin pairing. Omote (front): two figures facing one another across the seppa-dai, with a raised pole/staff (possibly a spear or banner staff) between them; the left figure crouches over a rounded barrel or keg, the right figure stands with a sword or staff at his side. Ura (back): a related genre scene — a horse or roped animal on one side, and a seated figure (possibly holding a young monkey or child) on rounded bales with a barrel/keg below on the other side.

● Precise subject/story identification (e.g., a specific folk tale, historical episode, or genre theme) has not been confirmed and should be treated as an open research question rather than settled fact.

● Kozuka-ana and kogai-ana: standard utility-tool holes on either side of the nakago-ana.

● Nakago-ana: unmodified, matching the blade's tang shape — indicating the tsuba was made for (or correctly fitted to) this blade rather than adapted from another mounting.

Original mounted tsuba — omote (front)

Original mounted tsuba — ura (back)

Seppa (spacer washers)

Three included: brass, tin-colored, and copper (the copper seppa matching the habaki metal).

Fittings overview — tsuka, wooden mekugi peg, all three seppa, and the original mounted tsuba together

Saya (Scabbard)

● Black lacquer (urushi), worn with age.

● Kurikata: black horn loop for threading the sageo (belt cord).

● Missing the kojiri (protective end-cap/tip) — a very common area of loss on antique saya.

Sword shown on a decorative presentation/storage cloth, with bright orange sageo cords and tassel

Note: the sageo (cord) and tassel shown here are bright orange, distinct from the black horn kurikata/sageo pairing described elsewhere in this record. This is most likely a decorative or ceremonial sageo swapped in for photography/storage/presentation rather than the everyday working cord, but this has not been confirmed with the owner and should be treated as an open observation rather than a settled fact. The floral (kiku/chrysanthemum-patterned) cloth is a separate decorative wrapping textile, not part of the koshirae itself.

Sword assembled and drawn, shown above its saya

Fuchi, sharp close-up, with tsuba visible behind

Kojiri (Replacement — Selected)

Two candidate kojiri were evaluated to replace the missing end-cap: a black horn piece and a gilt-bronze piece with a stippled, pebbled surface texture. Close-up photographs of both the fuchi and the kashira (tsuka collar and pommel cap) show the same stippled gilt-bronze texture and tone, confirming a matched fuchi-kashira set on this mounting.

● Selected: the gilt-bronze kojiri, on the basis of the metal/texture match to the confirmed fuchi-kashira set.

● Fuchi-kashira match confirmed: both pieces share the same stippled gilt-bronze surface treatment. Minor pattern variation between the two is expected and normal — fuchi and kashira are separate castings even within an original matched set — and does not undermine the match.

● Caveat: the kojiri's decorative pattern is not an exact match to the fuchi/kashira pattern, but all three pieces are consistent with the same broad period (roughly late 1700s–early 1800s) and the same general metal/finish family. With the fuchi-kashira match now confirmed, this reads as a coherent three-piece fittings ensemble rather than an independently sourced but merely compatible replacement.

● Before final fitting: confirm the kojiri's oval dimensions match the saya's tip cross-section, and confirm the saya tip is undamaged and able to accept a friction-fit/pinned metal cap (unlike a horn kojiri, no lacquer bonding is typically involved).

Kashira detail — matching stippled gilt-bronze texture, confirming the fuchi-kashira set

Koshirae fittings map — current status of each fitting based on recent findings

Fuchi detail — stippled gilt-bronze texture used as the reference match

Selected kojiri (gilt-bronze) — top view

Selected kojiri (gilt-bronze) — angled/edge view

Alternative candidate (black horn) — not selected

Overall Picture

The matching deep patina across the brass fittings, the naturally worn (not artificially aged) tsuka components, and the correctly-fitted, unmodified original tsuba together suggest an intact, coherently assembled, historically used koshirae — not a later marriage of mismatched parts. The missing kojiri is a minor, very common condition issue rather than a red flag.

Full koshirae, disassembled — blade, saya, tsuka, tsuba, seppa, and small fittings laid out together

Photo-Based Observations (Direct Examination of Images)

The following supplements the earlier written descriptions with observations made directly from photographs of the blade, tang, and koshirae.

Blade (in polish)

● Sugata: elongated shinogi-zukuri form with graceful koshizori curvature.

● Kissaki/Boshi: clean yokote line separating the point from the body; the boshi curves back consistent with ichimonji-kaeri. Fine crystalline nie/chikei activity in the tip, while reported by the owner, is difficult to confirm with certainty from photographs alone.

● Shinogi-ji / Hira-ji: a lengthwise bōhi groove runs parallel to the mune with clean, crisp, evenly cut edges — deliberate and skilled execution.

● Overall polish: good, well-maintained, clear reflective surfaces along hira-ji and shinogi-ji.

Kissaki, alternate angle — boshi turnback and yokote line

Blade surface detail, alternate section — bōhi and ji texture

Nakago (Tang)

● Visible mekugi-ana (single, as previously described).

● Surface shows old, even pitting and patina consistent with genuine long-term age.

● File marks and tang shaping visible, consistent with the kesho-yasurime description.

Habaki

Copper, with a visibly worked/stippled (nanako-like textured) surface and warm, even oxidation across its face — consistent with age and handling rather than a modern replacement.

Koshirae

● Tsuka: dark, aged same visible through gaps in the tsukaito wrap; the ito shows genuine wear, fraying, and grease-darkening.

● Tsuba: openwork design featuring two human figures in relief, consistent with the Daikokuten/Ebisu pairing. Fine iconographic details suggested by composition but not fully resolvable at photo resolution.

● Seppa: three spacer washers of differing metals/tones visible together, matching the earlier description.

● Full koshirae layout: a complete photograph of the disassembled mounting confirms the set is coherent and complete, photographed together as a matched ensemble.

Assessment

Every feature visible in the photographs is consistent with the written descriptions recorded earlier in this document, and nothing observed contradicts the NBTHK's Kaifu/Shinshintō attribution. The quality of execution is consistent with top-tier work from a senior Kaifu-school smith, but photographs cannot substitute for in-hand examination under proper light by a qualified appraiser. Attribution to a specific named smith would require direct physical examination and comparison against verified reference oshigata, not photo review.

Categorized Characteristics Summary

Sugata (overall shape)

● Shinogi-zukuri construction with iori-mune (peaked spine).

● Nagasa 70.1 cm (per official Torōkushō) — a standard katana length, not unusually long.

● Koshizori-leaning curvature — associated with Nanbokuchō-period Sōshū-influenced blades rather than typical later Edo utility swords.

Kissaki (point)

● Elongated kissaki, longer than standard chū-kissaki, based on visual proportion in photographs — a visual impression rather than a measured comparison, and should be confirmed in-hand rather than treated as settled.

● Yokote crisp and clean.

Mune (spine)

● Iori-mune with an additional deeper bevel near the tip (~2 inches back) — an uncommon refinement.

Boshi

● Ichimonji-kaeri (straight turnback).

Hamon

● Suguha-based with slight notare.

● Activity extends unusually close to the habaki (~1 inch below).

Jihada

● Mokume with straight (masame-like) lines, bluish-gray tone; ji-nie and chikei present, concentrated near the kissaki.

Nakago (tang)

● V-tapered, single mekugi-ana, asymmetric bōhi rise on the ha side, kesho-yasurime, natural aged patina heaviest near the mekugi-ana and cutting-edge side.

Habaki

● Copper, double-stepped, textured/stippled surface.

Attribution Discussion

The combination of features above is not typical of the "blunt, purely utilitarian" reputation often associated with ordinary Kaifu-school output. That reputation describes the school's median production, not its ceiling; this blade reads as an outlier above that median based on the documented features.

Reasonable, evidence-supported possibilities

● A senior, named Kaifu smith (most plausibly a late Ujiyoshi or Yasuyoshi generation) producing a presentation-grade or domain-commissioned showpiece — consistent with all documented features, and the most likely explanation.

● The blade representing one of a smith's finest surviving works, potentially made for a specific patron or occasion within the Hachisuka domain.

Not supported and should not be assumed

● Attribution to any individual smith by name, Kaifu or otherwise — the NBTHK's school-level attribution remains the operative fact.

● Any connection to smiths or traditions outside the Kaifu school — the Sōshū-style influence present is consistent with skilled work within the Kaifu tradition, not evidence of a different origin.

Overall assessment: this appears to be a genuine top-tier example of what the Kaifu school was capable of at its best — most likely a deliberate showpiece by one of its senior smiths — rather than either routine Kaifu utility work or a blade requiring reattribution outside the school. This stops short of (and should not be conflated with) attribution to a specific named smith.

Reference Diagrams

US Market Value Estimate (Informal — Not an Appraisal)

Based on comparable NBTHK Hozon-papered Kaifu-school katana currently listed by established Nihonto dealers (typically $3,400–$5,700 retail for smaller, plainer examples), and factoring in this blade's above-average characteristics, a reasonable estimate is:

● Dealer retail: roughly $5,000–$9,000, with potential upside if a specialist dealer or auction house judges the size/quality combination as exceptional.

● Private sale / auction: typically lower than dealer retail, often 50–70% of the above range.

This is a directional estimate based on comparable listings, not a formal appraisal.

Candidate Tsuba — Newly Acquired (Confirmed Replacement, Pending Fitting)

This section documents a separate iron tsuba purchased by the owner, confirmed to replace the copper narrative-scene tsuba described above once fitting work is complete. The two are recorded independently so the outgoing tsuba's description remains on file even after the swap.

Description (Visual, from Photographs)

● Construction: iron plate, sukashi (openwork), with gold zōgan (wire/foil inlay) highlighting figures and details against the dark iron ground.

● Motif: a warrior/battle scene — armored figures, banners or standards, and what appears to be a drum or military fitting, rendered across the omote (front) and ura (back) faces as complementary compositions.

● Omote (front): dense figural grouping — multiple armored warriors, a curling banner or sash motif, and a mon (crest)-like roundel near the upper right.

● Ura (back): a lighter composition — a mounted or standing figure beneath a cloud/wave-like border band, with a crest medallion and scattered gold accents (possibly maki-e-style motifs or family crests) in the lower field.

● Rim (mimi): plain, moderately thick rim with even, old patina and visible wear/loss to the gold at high points — consistent with genuine age and handling rather than a modern reproduction, though this is a visual impression only.

● No mei (signature) visible in the photographs provided.

The inlay technique (nunome zōgan vs. hira-zōgan vs. suemon) and the school/workshop attribution cannot be determined from photographs; both would require in-hand study of the metal surface and inlay under magnification.

Possible School Associations (Unverified)

Iron sukashi work with gold zōgan in a narrative/figural style of this kind is often associated with Higo-related lineages (Hayashi, Nishigaki, Kamiyoshi) or provincial Shōami-school work. No attribution is asserted here — this is a starting point for research, not a conclusion, pending expert in-hand examination or comparison to reference oshigata/zuroku.

Fit-to-Blade Checklist (Kaifu Katana Nakago)

The Kaifu blade's tang is kurijiri (rounded-bottom) in shape with a single mekugi-ana. Initial test-fit indicates the nakago-ana on this tsuba is too narrow for the blade's tang thickness (motokasane 7.8 mm), so filing/enlarging the nakago-ana is required rather than closing a gap with seppa. Before and during that work, the following should be checked:

● Nakago-ana contour: file only the minimum material needed to seat the kurijiri profile of the nakago; preserve the surrounding seppa-dai and sukashi work untouched.

● Direction of fit: since the hole is being enlarged (not reduced), this is the correct direction for filing rather than sekigane — sekigane inserts are used when a hole is too large, not too small.

● Professional execution: this work should be done by an experienced tosogu/togishi craftsman rather than as a DIY job, to avoid chipping the plate or disturbing patina at the hole's edge.

● Seppa-dai proportions: confirm the flat central area around the nakago-ana still reads as proportionate to the nakago width once filing is complete.

● Hitsu-ana: determine whether the kozuka/kogai openings on this tsuba should remain open, be fitted with kozuka/kogai, or be closed with sekigane.

● Orientation: confirm which face (omote/ura) should face forward once mounted, based on the direction the sword is worn in the obi.

● Diameter and weight: compare against the outgoing copper tsuba to assess balance/handling impact after the swap.

Replacement Status

Confirmed: this iron tsuba will replace the copper narrative-scene tsuba once the nakago-ana has been filed to accept the thicker Kaifu blade tang. The outgoing copper tsuba's description and photographs are retained above for the historical/koshirae record even after the swap is completed. This entry will be updated with post-filing photographs and final fit notes once the work is done.

Candidate tsuba — omote (front)

Candidate tsuba — ura (back)

Candidate tsuba — rim (mimi) detail

Research Notes / Open Questions

● Whether a formal Origami (appraisal paper) beyond the school/period attribution names a specific smith.

● Preservation planning discussed: traditional nori (rice paste) for any reversible fittings work; avoiding modern adhesives or heat near lacquered surfaces; cold chemical patination methods if matching fittings patina.

● Candidate tsuba: pending physical test-fit against the Kaifu blade's nakago; pending any specialist opinion on school/period/technique.

This document was compiled from conversation notes and the official NBTHK attribution provided by the owner. It is a personal reference record, not an appraisal document.

 

[Andrea Coltelli]

The photos did not copy from the file: 

This is the replacement kogiri which is currently missing and the replacement tsuba. 

[Nukitsuke]

Cool, so Giordy was right! That settles it! Enjoy your sword!

[Andrea Coltelli]

The photos did not copy from the file: 

This is the replacement kogiri which is currently missing and the replacement tsuba. 

[Andrea Coltelli]

52 minutes ago, Nukitsuke said:

Cool, so Giordy was right! That settles it! Enjoy your sword!

Thank you. It’s in Japan with NBTHK. I should receive it in September.