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By Shigeki Tanaka

Shigeki Tanaka KU Blue 2

Sanmai - Soft Iron Clad Kurouchi Blue 2 / Aogami #2 / Carbon Miki, Japan

Forget the polish – Shigeki Tanaka's Blue #2 line is where real cutting happens. This is one of Tanaka's long-standing signature series, beloved for getting the fundamentals brutally right: a perfect profile, true workhorse grind geometry, and outstanding cutting feel that powers through prep.

Yeah, the finish is rustic. It's not a show pony. But that's the point. Tanaka pours his skill where it counts: masterfully heat-treating Blue #2 steel. This gives you serious edge retention combined with solid impact resistance – a blade built for the long haul.

This is the definition of a workhorse grind: thicker spine, robust edge, built to take real impact and keep slicing. No delicate lasers here – just reliable, day-in, day-out performance.

Heads up: It's carbon steel with iron cladding. That legendary toughness comes with responsibility – it wants to rust. Seriously, just keep it dry between tasks and after washing. It demands respect, but rewards you with incredible cutting power.

If you want a knife that feels solid in hand, powers through ingredients, and prioritizes pure, durable performance over fancy finishes, this Tanaka Blue #2 is your true carbon workhorse. Pay for the grind, not the gloss – just remember the towel! 

Pros

  • Budget friendly
  • Excellent performance

Cons

  • Need extra care
  • Prone to rust

Best For

  • Pro chefs
  • Enthusiasts
Construction
Sanmai - Soft Iron Clad
Surface Finish
Kurouchi
Steel
Blue 2 / Aogami #2 / Carbon
Origin
Miki, Japan
miki shigeki tanaka rustic blue 2 kurouchi wa handle japanese kitchen knife

Frequently asked questions

Who is Shigeki Tanaka?

Shigeki Tanaka (田中誠貴) is a kitchen-knife craftsman based in Miki, Hyogo, Japan. The company page names him the representative of his family workshop, KANEGEN (田中一之刃物製作所), and his knives carry his own maker brand, Shigeki-saku (誠貴作).

Reviewed by James Zhang

Are Shigeki Tanaka knives hand-forged?

Yes. The workshop says everything it makes is fully forged and hand-hammered (本鍛造・手打ち), and that because of this each knife differs, one by one.

Shigeki Tanaka (田中 誠貴) sells under the mark 誠貴作 (Shigeki-saku).

Published by K&S Education Desk; staff review pending

What is the difference between Blue 2 and White 2 steel?

Proterial lists 1.05 to 1.15% carbon for both steels; its Blue 2 table lists 0.20 to 0.50% chromium and 1.00 to 1.50% tungsten, while its White 2 table lists neither.

Proterial describes White 2 as a carbon steel with minimum impurities and high hardness, and Blue 2 as an alloy steel with tungsten and chromium to improve heat-treatment properties and wear resistance, with a hardening hardness of over 60 HRC for both. In its Japanese materials, Proterial calls its Aogami (青紙) steels high-carbon steel (高炭素鋼). Neither steel is close to the JSSA's 10.5% minimum for stainless.

Published by K&S Education Desk; staff review pending

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