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越乃昇龍 Koshi no Shoryu

Documented brand

Quick answer

MakerKataoka Seisakusho (Brieto / TAMAHAGANE)RegionTsubame, Niigata — Tsubame-Sanjo MarksBrieto / ブライト / 響十 / 越乃昇龍 / TAMAHAGANESteelsMolybdenum-vanadium stainless, SG2 / R2 Knife types madeGyuto, Santoku, Petty, Sujihiki, NakiriMain useWestern-style chef's knife: meat, large vegetables, rocking cuts. Recommended whetstone1000 → 3000 JIS · how to sharpenMaintenanceWipe dry after use. Dishwasher still not recommended — the heat and detergent dull the edge and loosen handles.

What this mark means

越乃昇龍 reads Koshi no Shoryu. It is a brand name used by Kataoka Seisakusho (Brieto / TAMAHAGANE) (株式会社片岡製作所), Tsubame, Niigata — the Tsubame-Sanjo region. 'Rising dragon of Koshi' (Koshi = old name for the Niigata/Hokuriku region), usually with 匠技 (takumi-waza) and 日本製. Retailer listings attribute it to Kataoka; seen as a White #2 monosteel line and as a 63-layer damascus that matches the TAMAHAGANE Kyoto blade. Asked about on r/japaneseknives, 2026-10.

Other marks from the same maker

About the maker

Brieto-M11 Pro is the professional stainless line (hammered, molybdenum). TAMAHAGANE 響十 (Kyoto) is the export san-mai/damascus line with wooden handles; core steel reported as SG2 on the 響十 63-layer models (to confirm from catalogue).

Products carrying this mark

  • Brieto-M11 Pro — 牛刀 / 筋引 / ペティ (professional line)
  • TAMAHAGANE 響十 — 筋引 · ¥27,629

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