Kanji ID on Shigefusa Takobiki?

[da_mich*]

Hello,
does anybody here know this kanji? On the Backside is a Shigefusa(重房) stamp Thanks for help

 

[ThirdJewel]

Kiya

 

[da_mich*]

Kiya

thank you very much. Do you know why there is a kiya and a Shigefusa stamp?

 

[Moooza]

Great article here: Shigefusa Kanji: A Guide

 

[da_mich*]

Great article here: Shigefusa Kanji: A Guide

thank you very much! Great article! This is the answer "Both Kiya and Munemasa are renowned resellers of Shigefusa knives, carrying these knives under their own label" it also says this Shigefusa stamp is ultra rare