Masamoto Korin Shiro #1 Hongasumi Mirror Finish Yanagi
Item #: HMA-KZYA
Size: 4 Sizes Available
Style: Sashimi Slicer
Forging the Bond We are honored and excited to announce Masamoto’s first ever knife collaboration with Korin. These knives are expertly forged and crafted by the very best blacksmiths and edge crafters in Japan and are 100% hand-made.

The Blade: Forged from Shiro-ichi, one of the most difficult types of steel to work with, this steel is very close to a tamahagane, which is used for traditional samurai sword forging. The resulting blade has superior edge retention and a fluid cutting feel. The Japanese characters, written on the saya cover (Rensikouhamikakusho), allude to the knife having not only superior edge retention, but also creating beautiful cuisine and enhancing the flavor of the food on the plate. To ensure perfection, each blade is hand inspected.

The Handle: The magnolia, octagonal handle is fitted with water buffalo horn on the bolster and butt cap to ensure a comfortable feel in the hand. The two dark wooden bands are crafted from Bubinga wood, an African hardwood. Bubinga is regarded as a wood imbued with spirituality and is used in Japan to make wadaiko drums and other instruments used in Shinto ceremonies and festivals.

Kizuna: The red kanji stamp on the blade of the knife, kizuna, is the Japanese word for ‘bond’ or ‘connection’. The goal of the craftsmen who make these knives is to truly forge a bond between themselves and the chefs who use these knives. We hope that you feel this kizuna when you use these truly special knives from Masamoto.

Available exclusively from Korin.

List Price: $
Price per Item: $930.00 – $1,150.00

White Steel #1
Magnolia Wooden Cover Included
Single Sided
Magnolia Wood
Water Buffalo Horn (Bolsters are made from natural horn therefore colors may vary)
63 - 64

* (Bolsters made of water buffalo horn may vary in color)

For Left-Handed Customers

  • Left-handed blades must be special ordered from Japan, and will cost 50% more than the right-handed blades. Due to how each traditional Japanese knife is handmade by right handed craftsmen, it will take 4 to 6 weeks to forge and deliver.

Did you know?

  • Korin offers their customers a free maintenance service for all traditional Japanese knives!

  • The initial blade serves as a sharpening guide in the future. Free initial sharpening and uraoshi sharpening is available with every purchase. Please be aware that sharpened knives are not eligible for returns.

General knife care tips and warnings

  • Never wash knives in the dishwasher
  • This is not stain resistant. It will rust and discolor after cutting acidic ingredients or if one leaves it wet.
  • Improper care will result in chipping.
  • Please wipe knives dry after use to prevent rusting. Korin recommends wiping carbon knives with tsubaki oil to keep moisture off the knife.
  • Western style knives sold at KORIN have significantly thinner blades than typical Western knives. Use of honing steels or sharpening machines may result in chipping.
  • We advice all customers to always use sharpening stones to sharpen or hone knives.


Please be cautious when inspecting carbon knives with wet hands after purchase. We ask customers to inspect all knives prior to using, and will not accept returns on damaged goods. In the event you receive a rusted knife, please call customer service within 48 hours, and we will be happy to assist you.

For more information, please check our pages on different types of sharpening stones or sharpening tips.

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