User blog comment:Rtys8/Okay.....i'll have to aplogize a bit on some slight accuracy issues./@comment-16526045-20140611130615

Ok.....i wasn't too satisfied with Kannagiri's translation,but here's what i can gather....

Kannagiri Nagamitsu.

Lets review the facts first and i'll revise the sentence Misuzu mentioned.

A.The sword was used by a samurai named Katada Matagoro(堅田又五郎) in Oumi province,who was invited by the hospitality of a carpenter who was a Youkai in disguise,who wanted to trick him with hospitality,and them possibly kill and eat him.

B.The sword broke into two when he drew it and thrust it at the Youkai.

C.The sword is a Zantetsuken.

Chant:「陰 の一閃」",Yin no Issen,which should translate roughly to  "Flash of the Single Strike."

[Okay,it seems like i will actually get more information in the scene of Sword Vs Fist 7th October.]