Japanese Petty Knife Guide: The Essential Utility Blade

Q: What is a petty knife used for?

A Japanese petty knife is used for detail work — peeling fruits, trimming vegetables, deveining shrimp, slicing small ingredients, and any task that requires more precision than a chef's knife. It's the second most-used knife in professional Japanese kitchens after the gyuto.

Q: What size petty knife should I get?

120-150mm is ideal for most cooks. 120mm for in-hand peeling work, 150mm for small cutting board tasks. Some cooks prefer 80mm for pure paring work, but 120-150mm is more versatile.

March 28, 2026

The petty knife (ペティナイフ) is Japan's compact utility blade — smaller than a santoku but larger than a paring knife, it fills the critical gap for detail work that larger knives can't handle. Every professional Japanese kitchen has at least one petty, and it's the ideal second knife for home cooks.

What Is a Petty Knife?

The Japanese petty knife (from the French "petit," meaning small) is a utility knife typically 80-150mm in length. It features a thin, pointed blade that excels at precision tasks. While Western paring knives tend to be short and stubby, Japanese petty knives are longer and more refined, making them useful for both in-hand work and cutting board tasks.

What a Petty Knife Is Used For

Fruit preparation — peeling apples, segmenting citrus, hulling strawberries
Vegetable detail work — trimming, tourné cuts, brunoise of shallots
Protein prep — deveining shrimp, trimming silver skin, butterflying chicken
Garnishing — creating fine vegetable garnishes and decorative cuts
Small slicing tasks — cutting cheese, slicing small tomatoes, portioning herbs

Size Guide

Size	Best For	Style
80mm (3")	Pure paring — in-hand peeling work	Paring style
120mm (4.7")	Most versatile — in-hand + cutting board	All-round petty
150mm (6")	Light cutting board work, small gyuto alternative	Utility style

Petty vs Western Paring Knife

Feature	Japanese Petty	Western Paring
Length	80-150mm	75-100mm
Blade profile	Longer, more refined	Short, stubby
Steel hardness	60-65 HRC	56-58 HRC
Edge angle	10-15°	15-20°
Cutting board use	★★★★★	★★★
In-hand use	★★★★	★★★★★

Our Recommendations

Best Budget: Tojiro DP Petty (120mm) — ~$35

VG-10, 3-layer. The same outstanding value as the Tojiro DP santoku, in a compact size. Sharp, reliable, affordable.

Best Mid-Range: MAC Professional Petty (135mm) — ~$65

Incredibly thin and sharp. The MAC petty is a professional favorite — light enough for extended detail work, sharp enough for anything.

Best Premium: Shibata Kotetsu R2 Petty (135mm) — ~$180

SG2/R2 steel, laser-thin blade geometry. One of the finest petty knives available. Exceptional cutting feel and edge retention.

Frequently Asked Questions

What is a petty knife used for?

A Japanese petty knife is used for detail work — peeling fruits, trimming vegetables, deveining shrimp, slicing small ingredients, and any task that requires more precision than a chef's knife. It's the second most-used knife in professional Japanese kitchens after the gyuto.

What size petty knife should I get?

120-150mm is ideal for most cooks. 120mm for in-hand peeling work, 150mm for small cutting board tasks. Some cooks prefer 80mm for pure paring work, but 120-150mm is more versatile.

Do I need a petty knife if I have a santoku?

A petty knife complements a santoku perfectly. The santoku handles main prep work, while the petty handles detail tasks that are awkward with a larger knife. If you cook regularly, a petty should be your second knife purchase.