Yajimaya (ROKUSHIRO) 株式会社矢嶋屋「六四郎」

Tsubame, NiigataWholesalers with own brands ✓ Seen in person · 2026-09-14

Quick answer

MakerYajimaya (ROKUSHIRO)RegionTsubame, Niigata (Tsubame-Sanjo) Marks六四郎 / ROKUSHIROSteelsAUS10, VG10 Knife types madeSantoku, Gyuto, PettyMain useAll-round home knife: vegetables, fish, meat. The first knife to buy. Recommended whetstone1000 → 3000 JIS · how to sharpenMaintenanceWipe dry after use. Dishwasher still not recommended — the heat and detergent dull the edge and loosen handles.

Marks on the blade

Mark	Reads	Kind	Confidence	Note
六四郎	Rokushiro	mei	Seen in person
ROKUSHIRO	Rokushiro	logo	Seen in person

About

Brand 六四郎 (ROKUSHIRO): AUS10 three-layer santoku (R-S170, 170 mm, 135 g, resin handle) and a 37-layer damascus line with VG10 core (R-DS170 / R-DG180). Sold through its Rakuten shop 'Joy Island' and home centres.

Steels

AUS10 — Aichi Steel stainless, often as a clad core in Tsubame factory knives (ROKUSHIRO).
VG10 — Takefu Special Steel's stainless with cobalt. The default steel of Tojiro's DP/PRO lines; also in damascus lines.

Facts

Kanaやじまや / ろくしろう

Smith / productionTsubame factories

Address燕市

Tel0256-64-8546

Websiteitem.rakuten.co.jp/joy-island/r-s170

Typical overseas price—

Knife types made

Santoku 三徳 · All-round home knife: vegetables, fish, meat. The first knife to buy.
Gyuto (chef's knife) 牛刀 · Western-style chef's knife: meat, large vegetables, rocking cuts.
Petty ペティ · Small jobs in hand: peeling, trimming, garnish, fruit.

Care for these steels

Stainless (VG10 / AUS10 / molybdenum / CROMOVA / SG2)

Wipe dry after use. Dishwasher still not recommended — the heat and detergent dull the edge and loosen handles.
Powder steels (SG2) chip rather than roll: avoid bones, frozen food and twisting cuts.
Sharpen on #1000; finish on #3000–5000 if you like a polished edge.

Where to buy

Buy direct from Sanjo (through us)Maker website Amazon US affiliate Amazon JP affiliate

Products (3)

Series / brand	Item	Type	mm	Steel	Construction · finish	Handle	Price	Src
六四郎 ROKUSHIRO	三徳 170 R-S170	Santoku	170	AUS10	three-layer	polypropylene	no price	link
六四郎 37層ダマスカス	三徳 170 R-DS170	Santoku	170	VG10	37-layer damascus	—	no price	link
六四郎 37層ダマスカス	牛刀 180 R-DG180	Gyuto	180	VG10	37-layer damascus	—	no price	link

Photos

Photos will be added as we photograph our own knives or receive images from the maker.