Your search for "Kosuke Muneishi petty knives" revealed the following:

Kosuke Muneishi Hand forged blank blade Blue #2 steel Polished Kiritsuke Tanto knife 120mm

$57.80

Using yasuki hagane blue #2 steel and the tempering method taking over from the first-generation head gives high quality stabilizes...

$69.80

Using yasuki hagane blue #2 steel and the tempering method taking over from the first-generation head gives high quality stabilizes...