Nigara, with their more than 350 years of katana forging history, ocassinally produce some extreme-skill-showing knives that displays their unique Japanese artistics.
For example the "Onikoroshi (Troll Killer)" requries multiple times of forging, twesting. The forging process is done by master Tsuyoshi Yoshizawa (吉澤 剛) himself who also often forges samurai swords. The wrongt iron cladded knives gives out the highly attractive clouds on the cladding. The "Kagetora (Tiger Shadow)" series comines Blue 2 and White 2 steel, demonstrating unrivalled forging skills.
These knives are very hard to come by and highly collectible.
