Konosuke Sumiiro Petty 150mm

£250.00

Superb fit and finish with a nice taper from the heel and an impressive edge, the Sumiiro petty is a classy utility knife.

Product variants

Currently out of stock

Product Code: KONO-027-##

Knife & Range Specifications

Knife Measurements

Blade Edge Length: 156mm / 6.14" (Measurement of the cutting edge)
Total Knife Length: 300mm / 11.81" (Blade tip to handle end)
Blade Height: 31.8mm / 1.25" (Heel to spine)
Blade Thickness: 3.08mm / 0.12" (Spine width above the heel) 2.30mm / 0.09" (Measured halfway along spine) 1.51mm / 0.06" (Measured 15mm from tip)
Total Weight: 84 grams / 2.96 oz

Our aim is to measure and photograph our products as accurately as possible but due to many items being handmade, finished or using natural materials, there can be minor variance in measurements and finishes.

Range Specifications

Core Steel: SLD
Cladding Steel: Stainless
Blade Finish: Migaki | Polished | Tsuchime
Hardness: 65 (HRC)
Handle Style: Japanese (Wa)
Handle Material: D shaped burnt chestnut
Left or Right handed: Suitable for both (Double Bevel)

Some measurements such as HRC are provided by manufacturers and should therefore be used as a guide.

Konosuke - Sumiiro

Our in-depth range review

First Impressions

The Sumiiro was designed to be slightly taller at the heel and thicker at the spine than other Konosuke knives but without compromising on the performance you'd expect from the very hard SLD steel core.

Beauty

This is undoubtely a stunning range. The black nashiji finish gives a nod to the black calligraphy ink used throughout the centuries in Japan while the core steel is polished to a fantastic mirror finish.

It's then paired with a D shaped burnt chestnut handle that both compliments and contrasts the blade. It's a striking knife in every respect.

In Hand

Thanks to that taller and thicker profile, the sumiiro is feels sturdy in hand but remains light, nimble and well balanced while the d-shaped handle has just a little texture in the finish to give a tactile finish in hand.

Durability

The SLD core steel takes and holds a great edge and has been hardened to a high level of 65HRC so it's going to last and offers exceptional edge retention.

Ease of Care & Maintenance Tips

SLD is close to being stainless so caring for it is pretty straightforward if you just follow the normal care instructions for any Japanese knife.

Sharpening knives at this level of hardness can require a little more time and effort than lower hardness steels but the tradeoff is the edge retention is improved and you'll find you need to resharpen less.

As this is a minimally reactive steel, we'd recommend a Japanese knife care kit for long term maintenance.

Our Verdict

The Sumiiro range boasts a superb level of performance and edge retention and the workhorse profile combined with the very thin edge glides through food.

Konosuke's attention to detail shows through in these beautifully made knives made by top blacksmith Takahiro Nihei.

Meet the maker

Konosuke

Konosuke is a renowned knife maker based in Sakai City, Osaka Prefecture, a region with more than six centuries of blade-making history. Founded by the fifth-generation Yamamoto family and led by Kosuke Kawamura, the brand evolved from a long lineage of expert sharpeners serving Japan’s top chefs.

Konosuke is celebrated for its collaborations with distinguished blacksmiths such as Yoshikazu Tanaka and Kenichi Shiraki, producing some of the most sought-after kitchen knives worldwide.

Known for their precise geometry, balance, and elegant finish, Konosuke knives embody the skill and refinement that define Sakai’s knife-making heritage.

View all Konosuke products