Hello !
I am trying to id this mei. I Think the mei reads Yoshimitsu. The fellow I got it from said it read Yoshimoto. But The last kaji looks to me more like "mitsu" than "moto".
I have gone through my books. And cant find any that it could be. It is in bad polish with a few places were the hamon and hada shows.
Hawlay list a bunch of yoshimitsu from koto.
I wonder if someone with Nihon To Koza , koto could check this mei against one of the later generations of the Tosa Yoshimitsu smiths. I have heard that the Bizen Book have many exampels of the Tosa School.
Because of the nakago, nijimei. Sori =3 cm, nagasa = 74 cm and narrow suguha/notare hamon, irragular boshi, patina and rusty nakago and at least the many polishes it has seen I think it is a koto pice. I think it may be a early Muromachi period. Any thoughts???
More better photos of the sword and mei click at this link:
http://home.online.no/~kjoklepp/yoshimitsu.cfm
Thanks
trygve