What is a hori hori knife?

From the whetstone · October 2026

A hori hori knife is a Japanese garden knife with a concave stainless steel blade, one straight edge, one serrated edge and depth markings. Here is where it came from, what it does and why so many gardeners say it is the one tool they cannot live without.

Nisaku hori hori knife digging in a garden bed

Where the name comes from

Hori means to dig in Japanese, and hori hori is the sound of digging, so the name is close to dig-dig. The knife was first used by the Matagi, traditional hunters in the mountains of northern Japan, to dig sansai, the wild mountain vegetables they gathered in spring. A Western salesman is said to have given it the double name, and it stuck; in Japan it is still often called a sansai knife or leisure knife.

What a hori hori knife is used for

The design is simple, which is why the list of uses is long:

Digging planting holes for bulbs, seedlings and plugs, with inch markings for depth
Transplanting and dividing perennials, hostas and ornamental grasses
Lifting tap-rooted weeds like dandelion and dock without leaving the root behind
Sawing through roots with the serrated edge when you clear a new bed
Cutting twine, opening compost and soil bags, trimming stems
Foraging, camping and fishing trips, carried in its sheath on the belt

Gardeners who own one tend to reach for it before a trowel, because a hori hori is sharp, narrow and strong enough to go where a trowel bends.

How the blade is built

A classic hori hori knife has a blade of 6 to 7.5 inches, slightly concave like a shallow scoop. One edge is straight and sharpened for slicing, the other is serrated for sawing. The tip is pointed to pierce compacted soil. On the Nisaku NJP650 the blade is 7.25 inches of Japanese stainless steel on a 5.25-inch wood handle, and the whole knife weighs about 10 oz. Stainless steel resists rust, which matters for a tool that lives in damp soil.

Tang matters when you pry. Most hori knives have a partial tang fixed into the handle, which is fine for digging and cutting. If you lever rocks and roots, a full tang, where the steel runs through the grip, like the Nisaku No. 6550, or a one-piece full metal knife like the No. 6800, is the stronger choice.

Is a hori hori worth it?

If you plant bulbs, divide perennials, or weed beds with tap-rooted weeds, yes. It replaces a trowel, a weeder, a pruning saw and a box cutter in one tool, and a good one lasts decades. A cheap knife with soft steel bends at the tip and loses its edge; a Japanese stainless blade hardened properly stays sharp and straight.

Which hori hori knife is the best quality?

Look for hardened Japanese stainless steel, a sheath, a comfortable handle and clear depth markings. Within the Nisaku range, the NJP650 is the reference everyday knife; the NJP651 and NJP801 are hardened to HRC58 for longer edge life; the NJP6510 adds a hard weatherproof sheath; and the No. 6550 and No. 6800 are the strongest builds.

Is a hori hori an offensive weapon?

A hori hori is a gardening and outdoor tool. Laws on carrying fixed blades in public differ from place to place, so keep it sheathed, carry it to and from the garden in a bag, and check local rules before carrying it elsewhere.