Here are a few Japanese tools that you might be interested in.
All are made by Kanetsune Seki.
Blade Length: 180mm (7")
BLADE = 120mm(4.7in.)
AUS-6 STAINLESS STEEL
HANDLE = BLACK PLYWOOD
OVERALL LENGTH : 320mm (12.60")
STEEL LENGTH : 180mm (7.09")
Gyutou Knife Sheath for K..