KAKURI Bonsai Saw 3-1/8 inch (80mm) Professional Japanese Carbon Steel Bonsai Pruning Tool, Small Bonsai Keyhole Saw, Made in JAPAN Review (2026)

What this saw is built to do

This is a keyhole style bonsai saw with a 3-1/8 inch, 80mm blade made of Japanese carbon steel, paired with a wooden handle made of Japanese beech. The long, narrow blade shape is the point of the tool: it is designed for cutting thick branches in narrow spots where leaves and neighboring branches are too crowded for a standard folding pruning saw or a pair of bonsai shears to fit. It is meant to complement, not replace, a concave cutter, stepping in specifically for branches too thick for a cutter's jaws but too enclosed for a full sized saw.

Size, weight, and materials

The whole tool measures roughly 1.1 by 0.5 by 8.3 inches and weighs about 0.9 ounces, making it one of the smallest dedicated saws in a bonsai toolkit, closer in size to a folding pocket knife than to a full pruning saw. Japanese carbon steel gives the teeth an edge that KAKURI markets as cutting with light force and minimizing damage to the tree at the cut site, which matters on a living branch where a ragged cut heals slower than a clean one. The beech handle is sized for a firm one hand grip rather than the two handed use a bigger saw would need.

Care that carbon steel blades need

Carbon steel holds a sharper edge than stainless steel but is more prone to rust, so any bonsai saw made from it needs to be wiped clean and lightly oiled after use, especially after cutting branches that bleed sap, since dried sap left on the blade accelerates corrosion. This is standard practice across Japanese carbon steel bonsai tools and is not unique to this saw, but it is a real ongoing maintenance step that a stainless steel tool would not require. Stored dry with a thin coat of oil, a carbon steel blade like this one should hold its edge for years of occasional use.

How it stacks up against other bonsai saws

Among eight bonsai saws in its category this one ranks fourth, behind KAKURI's own 4 inch folding pull saw and an Okatsune 195mm hand pruning saw, both of which trade this saw's tight reach for a longer blade suited to bigger branches. It scores just ahead of an ARS bonsai and ikebana saw and a KAKURI folding saw marketed more for general garden and camp use than dedicated bonsai work, and ahead of a 4-3/4 inch RANSHOU keyhole saw aimed at the same crowded branch niche this one fills.

Verdict and who should pick a different saw

For a grower who keeps running into thick branches jammed between other growth where nothing else fits, this small keyhole saw earns its 8.2 score mainly on build quality, since carbon steel and a beech handle are proven bonsai tool materials, with fit for the job and features both landing a point lower given how narrow its use case is. Anyone doing routine branch removal on open, accessible parts of a tree is better served by a longer folding saw with more reach, and this tool should be treated as a second saw added to a kit rather than the only saw a grower owns, since its short blade simply cannot substitute for one built for general pruning work across a whole tree.

Frequently asked questions