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Korin Knife Sharpening Service

Korin is the first company in the world that was given authorization and certification to re-sharpen and repair knives from Masamoto Sohonten, Misono, Knife Systems (Suisin) and Nenohi. Each knife sharpening from Korin will receive a complimentary plastic saya cover for the knife.

There are two ways to get your knives sharpen by Korin:


Drop off your knives at our
Korin showroom at
57 Warren street,
New York, NY 10007



Mail in your knives with the printed
knife service form to:
Korin Knife Service
57 Warren Street
New York, NY 10007

Knife sharpening service is on hold from May 23rd - June 5th. Sorry for any inconvenience it may cause.

Knife Sharpening Pricing

Western Style Knives
Double Sided

Sharpening Only


Major Repair, Chips, Rust and Thin Out


Japanese Style Knives
Single Sided

Sharpening and Repair


Korin Knife Service

Rust Removal

Korin are able to clean rusted blades or clean discoloration knives. However, there will be some isolated cases where cleaning is not possible. Watch the following video where Vincent explains some examples of such cases:

Korin Knife Service

Wrap your knives up very carefully using several sheets of newspaper. Please DO NOT include blade covers, boxes, or sayas.

Please pack your knives in a shipping box with extra cushioning (bubble wrap and/or newspaper) and please DO NOT mail in in an padded envelope to avoid accidents during shipping transit.

Visit Our Showroom

We are located in the heart of Tribeca




Mon, Tue, Wed, Thurs & Sat: 10am - 6pm

Closed Fri & Sun