eternal_newbie

It's definitely a wakizashi now, but was shortened to its current state from a naginata.

https://en.wikipedia.org/wiki/Shoami https://jameelcentre.ashmolean.org/collection/7/10237/10350

I believe this is it: https://stcroixblades.com/product/antique-Japanese-tachi-sword-papered-samurai-old-bizen/

I'd say hakikake then, with some notare-komi (the way it swells out slightly before reaching the tip). For reference: https://markussesko.com/2015/06/10/kantei-3-hamon-boshi-3/

A bit difficult to tell exactly how much nie there is in the hardened area, especially at the turnback, but I would agree with either kaen or hakikake in notare-komi.

For various reasons, many owners of Juyo candidates will instead appoint their agent (often the dealer they bought it from) as the blade's owner while in Japan. Makes things easier if the contact person is there and speaks Japanese (plus the shinsa fees are lower if submitted by a local NBTHK member).

If I'm not mistaken, Andrew Ickeringill has photographs of the Go on his Facebook page as he's the one who polished it (well done, by the way). https://www.facebook.com/toukentogishi

Just a heads up for anyone who's in Japan over the next few weeks that the New Juyo exhibition is running until the 1st of March in the Tokyo Sword Museum. 36 blades from the most recent Juyo shinsa and several koshirae and tosogu are on display. You can see the details as well as download an English list of exhibits here: https://www.touken.or.jp/museum/exhibition/exhibition.html And here is a link to @Jussi Ekholm's translation of the full results from the 71st Juyo Session: https://www.militaria.co.za/nmb/topic/54363-jūyō-71-results

Generally, when buying from a somewhat reputable dealer such as Aoi, they will have at least gone to the trouble of making sure the saya fits the blade by using a long-handled rasp. However it's always worth tapping out the saya to shake loose any debris or shavings before attempting a fitting - even for a koshirae that was custom-made for the blade.

If you can't find one, it may be worth sending yours in for shinsa to the NBTHK. Being a rare example of a signature adds historical (and often financial) value to a sword, especially koto.

Google Translate got it wrong, the original papers clearly state 8th gen (八代, hachi-dai). The 5th or 6th gen Masahiro (there are some disagreements; Nihonto Club says 5th gen https://nihontoclub.com/smiths/MAS205 while the Soshu-Den museum says 6th https://nihonto-museum.com/blog/soshu-tsunahiro) was the one who changed his name to Tsunahiro, however the Masahiro line continued for at least another 2 generations parallel to the newly established Tsunahiro line.

Not only that but blades owned by more prosperous samurai often had multiple koshirae at the same time (e.g. one for ceremonial duties, one for casual use, one for battlefield use). Check out this Hokke sword that just sold on the forum: https://www.militaria.co.za/nmb/topic/53726-nbthk-tokubetsu-hozon-hokke-katana-w-2-koshirae/

A good first blade indeed. Regardless of when it was made, koto Soshu in good condition is a very nice place to start. Putting in the effort of looking at blades in person has worked out quite well for you. I believe this is your sword: http://www.nihonto.us/SOSHU mASAHIRO KR.htm

The lighting tricks needed to properly photograph a blade also makes them look deeper than they really are.

Looking forward to it!