What does 正本 on a Japanese knife mean?

正本 reads Masamoto. It is a brand name used by Masamoto Sohonten (正本総本店) of Tokyo, in the Tokyo region. Same kanji used by Tsukiji Masamoto (separate company) — look for 総本店 or 築地 on the box/handle stamp.

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正本 Masamoto

Q: Who makes knives marked 正本?

Masamoto Sohonten. Brand in Tokyo. Steels: Shirogami #2, Aogami #2, Molybdenum-vanadium stainless. Knife types: Yanagiba, Deba, Usuba, Gyuto, Sujihiki, Petty, Honesuki.

Maker website brand

Quick answer

MakerMasamoto SohontenRegionTokyo Marks正本SteelsShirogami #2, Aogami #2, Molybdenum-vanadium stainless Knife types madeYanagiba, Deba, Usuba, Gyuto, Sujihiki, Petty, HonesukiMain useSlicing sashimi and sushi toppings in one pull stroke. Recommended whetstone1000 → 3000–6000 JIS · how to sharpenMaintenanceRinse and wipe dry immediately after each use — never leave it wet or in the sink.

What this mark means

正本 reads Masamoto. It is a brand name used by Masamoto Sohonten (正本総本店), Tokyo — the Tokyo region. Same kanji used by Tsukiji Masamoto (separate company) — look for 総本店 or 築地 on the box/handle stamp.

About the maker

The Masamoto that most overseas retailers mean (there is also Tsukiji Masamoto — a separate company, see below). Mark 正本 with 本焼 / 玉白鋼 etc. on single-bevel knives; Western lines read 'Masamoto' plus 正本. Hyper-Molybdenum (HC) gyuto is the classic sushi-counter workhorse.

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