Yahoo blade. Who made it? What significance?

[Chishiki]

Hi everyone.

 

this just finished on yahoo and sold for 301,000¥.   What intrigues me other than the price is that it has never been polished.  Ok, the file marks are similar to that on the unpolished side of a kozuka, but both sides?   Also the edge is dull as if never sharpened.   Is there someone here who can read what the seller says about it please?  Just a bit intrigued. Mark.  The link https://page.auctions.yahoo.co.jp/jp/auction/n458717532

https://page.auctions.yahoo.co.jp/jp/auction/n458717532

 

[PNSSHOGUN]

Made by Kasama Ikkansai Shigetsugu I think.

[16k]

You sure it’s not an oversized kozuka?

[Jussi Ekholm]

I believe it was made by Ikkansai Shigetoshi - 一貫斎繁寿

 

It is tiny tanto dated to 1905 and stating he was 68 when he made it - 明治三十八年二月日六十八翁作 , and I believe seller describes it never being polished. He also hints it might be among the last blades produced by the smith (if I understood that part correctly). I checked the smith died January 25th 1906 at the age of 69.

[vajo]

The horimo looks beautifull on that tiny blade. Will be the hell if someone want to polish it.

[Surfson]

This looks like it has the potential to be a very nice piece.  The horimono is very well done and it's a famous maker and school.  I had a blade once that had never been polished.  Rough filing and dull edge throughout.  It was made in Hokkaido and there was a thread on it in 2014.  I ended up selling it because I could not tell for the life of me whether it had ever been tempered.  Here is a link:

 

Since this tanto has a horimono, I would guess that it has been tempered, though I honestly don't know if horimono are only carved after yakiire, or if sometimes a horimono can be done first.  I would presume that the heating and quenching would distort a horimono.  Any information about that?  

 

[DoTanuki yokai]

I would say it was sold unfinished without polish and for unknown reason never saw a polisher.

And if he found a flaw and stoped the work because of this i think it wouldnt be signed.