# Kugihiki

Hewn Tool Library · https://hewn.build/tools/kugihiki

Corrected: An independent reviewer read this entry and found corrections. They have been applied to the text, and the reviewer re-checked the correction that mattered most for safety and found it done; the others have not been re-checked yet. The list at the end is the record of what changed.

Cite as: "Kugihiki." Hewn Tool Library, hewn.build/tools/kugihiki. Reviewed 2026-09-03.

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## Identity

- **Name:** kugihiki. Modern makers also call it **dabokiri** (dowel-cutting saw) and **asari-nashi** (saw without set): KAKURI — "In Japanese, it is also referred to as a 'Dabo Kiri Nokogiri' (dowel cutting saw) or 'Asari-nashi Nokogiri' (saw without set)" [KG24]. **review fix 5:** the exact reading, kanji (釘挽き / 釘引き), regional usage, historical term, and the relation between *kugihiki* and *kugibiki* are unresolved pending an authoritative Japanese lexicon or period source. The name is not used to establish stroke direction or origin.
- **Definition:** a flush-cut pull saw for trimming wooden dowels, pegs, plugs and similar small wooden projections close to a face [KG24][KG-GY][KG7].
- **Pull stroke:** established from tooth geometry and maker instructions, not from *hiki* [KG24][KG-KGuide].
- **One-line:** a thin, flexible, low- or no-set pull saw for cutting protrusions nearly flush while reducing the risk of scoring the surrounding surface.

## ✦ How NOT to use it

### Not-for (review fixes 2, 7)
- **Thick, general, rip or crosscut work.** Designed for shallow flush trimming; with little side clearance, friction and binding increase as more plate enters the kerf; practical capacity depends on the model, stock and maker guidance [KG24]. *(Practitioner texture: one forum user reports binding beyond "an eighth deep or so" on an unspecified saw [KG4] — not a category limit.)*
- **Metal, hard materials, wet or green wood** unless the specific maker says otherwise [KG24].
- **Embedded fasteners:** do not cut them unless the model is rated for metal; doing so can chip, bend or break teeth or plate [KG24][KG3].

### Dangerous (review fixes 1, 8 — the holding finding)
- **Fingers on or beside a toothed edge.** On a double-edged plate both long edges cut; there is no untoothed long side to guide. Handle and maker technique only [KG-GY][KG-KGuide].
- **Safety block (KAKURI guidance):** inspect the handle–blade assembly and the plate; clamp or support the work; check for hidden metal; keep both hands outside the tooth path; light pull strokes; stop on binding and do not lever it free; eye and hand protection; brush — never finger-clean — the teeth; dry and oil as appropriate; store covered [KG-KGuide][KG24].
- **Gloves are not permission to touch a cutting edge** [KG-KGuide].
- *Removed:* the "no laceration reports found" count and the risk-attenuation speculation.

### Damaging
- **Scoring the surrounding face (review fix 4).** The design reduces the risk; it does not remove it. Angling the blade can dig in [KG24]; marring happens even with no-set saws [KG2][KG14]. Keep the plate level, use light force, clear dust, protect or leave proud, and finish separately.
- **One-sided-set saw on the wrong face** — the set face will scratch [KG2].
- **Bending or forcing the plate** — excessive force can bend, break or chip [KG24].
- **Debris in the gullets** can reduce efficiency and may contribute to loss of control; brush it out [KG24] (review fix 12).

### Beginner-trap
- **Carrying a grip from a single-edged saw to a double-edged one.**
- **Trusting "flush without a scratch"** on a finished surface.

### Lineage-misuse
- **Treating it as a dozuki or general kataba** — no back, little side clearance, not for deep cuts.
- **Assuming all flush-cut saws share its set** — check each model [KG2].

## Correct use
*(Brief — the workbench holds operation.)*

1. **Identify the blade first:** single- or double-edged; fixed or replaceable; set on neither, one or both faces [KG-GY][KG2].
2. **Secure the work** — clamp or otherwise support it [KG-KGuide].
3. **Check the stock for hidden metal** — nails, screws, wires [KG-KGuide].
4. **Lay the plate on the intended contact face**, keep it level, and pull lightly; an angled entry can dig into the work [KG24].
5. **Grip by the handle.** Plate-guiding with the off hand is permitted **only** on a single-edged model whose maker documents it, with light pressure on a clearly untoothed area, fingertips behind the active tooth line and away from both ends of the stroke [KG24]. **Never on a double-edged blade** [KG-GY][KG-KGuide]. (Schwarz's "use fingers, not the handle" is practitioner advice for particular saws, not a universal instruction [KG2].)
6. **Stop on binding**; do not twist or force the plate [KG24][KG-KGuide].
7. **On fragile or finished faces**, leave the protrusion slightly proud, or protect the surface, and level with a plane, chisel or abrasive [KG24][KG29].

## Matching (the reviewer's schema notes)
- **does:** trims wooden dowels, pegs, plugs and similar small projections close to a face. Through-tenons and architectural pegs only where blade length, pitch and maker guidance fit the stock.
- **suits:** the documented users above, unranked.
- **kit-fit:** pairs with a plane, chisel or abrasive for final levelling, and with surface protection on fragile or finished faces [KG29].
- **not-for:** general or thick cuts; hard materials; wet or green wood; metal — unless the maker says otherwise. No numeric depth cap.
- **access:** distinguish fixed-blade from replaceable-blade products; no "default" or "dominant" claim.
- **revival:** the modern form is in active manufacture. No decline narrative for hand-forged saws is asserted.

## Anatomy — model table (review fixes 3, 7, 12)

| Model | Edges | Blade retention | Plate / kerf | Length | Teeth | Source |
|---|---|---|---|---|---|---|
| Gyokucho Razorsaw 1150 | single | **fixed** (not replaceable) | 0.3 mm / 0.3 mm | 100 mm | 1.0 mm pitch | [KG-GY] |
| Gyokucho Razorsaw 1151 | **double** (both crosscut) | **fixed** (not replaceable) | 0.3 mm / 0.3 mm | 125 mm | 1.0 / 1.3 mm pitch | [KG-GY] |
| KAKURI Mini Craft Saw — Flush Cut | single | as sold | 0.3 mm / 0.3 mm | 120 mm | 21.1 TPI | [KG-Kmini] |
| KAKURI Hand Saw, Red Oak Handle, Flush Cut 180 mm ("Dabokiri") | single | **replaceable** | no-set, flexible | 180 mm | 25 TPI crosscut | [KG-K180] |
| Suizan 7" kugihiki replacement blade | per listing | replaceable | 0.2 mm / 0.2 mm | 180 mm | ~30 TPI | [KG11] (maker listing) |
| Lee Valley Japanese Kugihiki | per listing | per listing | thin, no set | — | ~17 TPI | [KG10] (retailer) |

- **"No set":** teeth do not project appreciably beyond the plate, so reference kerf may equal plate thickness on a named model. Not every product marketed as flush-cut has exactly zero set.
- **Thin flexible plate:** works in tension on the pull stroke; the safe degree of bending and plate stiffness are model-specific [KG16][KG24].
- **Hardness and resharpening (review fix 7):** given only where a maker specifies it. Impulse-hardened teeth are normally replaced rather than filed [KG3]; that is separate from whether a saw is fixed-blade, and from traditional specialist-resharpenable hand-forged saws.
- *Removed:* the generic soft-iron-tang sentence and the 0.2–0.9 mm and 17–30 TPI category envelopes.

## Trades
- Joinery, furniture making, carpentry and instrument making (KAKURI) [KG-K180]; tategu context (Odate) [KG22]; luthiery (StewMac) [KG28].

## Lineage (bounded)

- **Related body forms:** single-edged like the [[Kataba]]; double-edged models share the [[Ryoba]] layout, though Gyokucho 1151's two edges are **both crosscut** at different pitches — not every double-edged Japanese saw has one rip and one crosscut edge [KG-GY].
- **Not a [[Dozuki]]:** no back, and little or no set.
- **Origin:** no consulted authoritative source fixes an origin date for the flush-saw form or shows a continuous line from a premodern object to current products. Gyokucho's history page says purpose-specific saw types multiplied from about the 17th century [KG8]; that is general context, not a kugihiki date. Chronology open.
- **Related Western designs:** Western flush-cut saws may use no set or one-sided set. A one-sided-set flush saw is **a related flush-cut design with a different tooth-set geometry**: it can protect one face only when oriented correctly [KG2] (review fix 11).

## History (bounded)

- **Odate, 1986 (to recheck).** UPI's 1986 coverage of a Toshio Odate seminar is cited for the passage: "there is a lovely little item called a *kugihiki*… its teeth have absolutely no set. It will cut a dowel off flush with the surface of your workpiece without leaving a scratch" [KG1]. The reviewer located the May 20, 1986 UPI article and Odate context but not that passage; the entry cites May 27 (Part 2). **The citation and exact wording must be rechecked before the quote is relied on.** "Without leaving a scratch" is quoted historical language, not this entry's claim (review fix 4).
- **Gyokucho.** Founder Masaaki Tomosada established Razorsaw Industry in 1969, and the company claims the original replaceable-blade Razorsaw [KG-GYco]. That history does not make every Gyokucho saw replaceable (review fix 3).
- **Takenaka Carpentry Tools Museum (review fix 6).** Takenaka's public saw-category digest (excerpts from Collection Catalogue No. 1, using standardized, chiefly Kansai names) does not list *kugihiki* as a category [KG25]. This review did not establish whether the museum holds a comparable object under another name. *Osaebiki*, in the "other saws" page, is a thin fine-toothed single-edge saw for the retaining groove of a plane body — a distinct function, not a synonym or ancestor.
- **Patents:** US 4,630,368, "Flush cut handsaws" (Izzi, 1986), is a plumbing flush-cut saw — a different tool, retained only as context [KG26].

## ✦ Human side

- **Documented users (unranked, review fix 11):** joiners, furniture makers, carpenters and instrument makers (KAKURI) [KG-K180]; *tategu-shi* context via Odate [KG22]; luthiers trimming dowel plugs when relocating tuners or bridge studs (StewMac) [KG28].
- **Makers of current saws:** Gyokucho [KG-GY], KAKURI [KG24][KG-K180][KG-Kmini], Suizan [KG11], Z-saw [KG12].
- **Hand-forged saws:** a Mitsukawa Juntaro flush saw is photographed and recommended "for hardwoods" in Brian Holcombe's guide [KG9]; Nakaya Takijiro is described as an individual hand-forging saw smith in a first-person visit report [KG27]. Practitioner and dealer attributions only (MEDIUM); no artisan genealogy or decline narrative is asserted.
- **Workshop practice:** leave a peg slightly proud and finish with a chisel or plane — Ed Pirnik: "leaving each peg about 1/8-in. proud… use my block plane to flush things up… finish things off with a sharp chisel" [KG29]. Christopher Schwarz on marring even with no set: "you chew up the surrounding surface with the saw's teeth" [KG2].
- **Dowels and screws:** KAKURI notes wooden dowels sometimes conceal screws in furniture [KG24]; no culture-wide "pegs instead of iron" origin is claimed (review fix 5).

## ✦ Proof of existence
- **Current manufacture (HIGH):** Gyokucho 1150/1151 [KG-GY]; KAKURI Mini Craft and 180 mm [KG-Kmini][KG-K180]; Suizan [KG11]; Lee Valley [KG10].
- **Craft-organization description:** Japan Woodcraft Association — a kataba-style saw "ideal for flush-cutting wood or bamboo dowels" [KG7].
- **1986 press (to recheck):** UPI / Odate [KG1][KG22].
- **Museum holding:** UNKNOWN — see Takenaka above [KG25].

## references

- **[KG24]** KAKURI, "What Is a Flush Cut Saw? Uses, Tips, & Maintenance" (2024), https://kakuritools.com/blogs/how-to-use-japanese-saws/flush-cut-saw-features — names; no-set geometry; reduced surface-damage risk; angled entry digs in; friction and binding; not for thick, general, hard, metal or wet work; light force; cleaning, rust prevention, covered storage; finishing; light finger pressure in its illustrated technique (reviewer-named).
- **[KG-KGuide]** KAKURI, "How to Use a Japanese Saw," https://kakuritools.com/blogs/how-to-use-japanese-saws/how-to-use-a-japanese-saw — clamping, inspection, embedded metal, controlled pull strokes, no force or twist, eye and hand protection, don't touch the cutting edge, brush chips, covered dry storage (reviewer-named).
- **[KG-GY]** Gyokucho, Razorsaw detail saw 1150/1151, https://gyokucho.co.jp/products/series/flush-cutting/%E3%83%AC%E3%83%BC%E3%82%B6%E3%83%BC%E3%82%BD%E3%83%BC%E7%B4%B0%E5%B7%A5%E9%8B%B8/ — 0.3 mm plates and kerf; 1150 single-edge 100 mm, 1.0 mm pitch; 1151 double-edge 125 mm, 1.0/1.3 mm crosscut; both fixed blade (reviewer-named).
- **[KG-GYco]** Gyokucho, company message/history, https://www.gyokucho.co.jp/company/message/ (reviewer-named).
- **[KG-Kmini]** KAKURI Mini Craft Saw — Flush Cut, https://kakuritools.com/products/kakuri-mini-craft-saw-flush-cut (reviewer-named).
- **[KG-K180]** KAKURI Hand Saw — Red Oak Handle — Flush Cut 180 mm, https://kakuritools.com/products/hand-saw-red-oak-handle-flush-cut-180mm — replaceable, 25 TPI, Dabokiri, named user groups (reviewer-named).
- **[KG25]** Takenaka Carpentry Tools Museum, "Finish-material saws," https://www.dougukan.jp/tools/15 and "Other saws," https://www.dougukan.jp/tools/16 (reviewer-named).
- **[KG1]** Jack Warner, "Working with Wood: The Tools of the Tategu-shi — Part 2 of 2," UPI, May 27, 1986 — **passage to be rechecked**; the reviewer located Part 1: https://www.upi.com/amp/Archives/1986/05/20/Exotic-tools-of-the-Japanese-woodworkerNEWLNThe-Tools-of-the-Tategu-shi/8432516945600/.
- **[KG22]** Jack Warner, "…The Tools of the Tategu-shi — Part 1 of 2," UPI, May 20, 1986 (URL above).
- **[KG2]** Christopher Schwarz, "Flush-cutting Without Frustration," Popular Woodworking (2018) — practitioner.
- **[KG3]** Don Williams, "Sharpening Impulse Hardened Saw Teeth," donsbarn.com (2022) — practitioner.
- **[KG4]** Sawmill Creek, "Flush saw questions" (2010) — forum texture only.
- **[KG7]** Japan Woodcraft Association, "Saws," japanwoodcraftassociation.com.
- **[KG8]** Razorsaw / Gyokucho, "Saw Development History & Chronology," razorsaw.co.jp/support/rekisi.html — general context.
- **[KG9]** Brian Holcombe, "Brian's Guide to Japanese Saws."
- **[KG10]** Lee Valley, "Japanese Kugihiki Saw" — retailer specs.
- **[KG11]** Suizan, 7-inch kugihiki replacement blade — maker listing.
- **[KG12]** Osaka Tools kugihiki collection (Z-saw models) — retailer.
- **[KG14]** Matthias Wandel, "Flush cutting dowels," woodgears.ca.
- **[KG16]** Nick Sawyer, "Tools of the Trade," sawyerdesign.io (2026) — pull-saw tension physics.
- **[KG26]** US 4,630,368, "Flush cut handsaws" (1986), https://patents.google.com/patent/US4630368A/en — plumbing saw; context.
- **[KG27]** Big Sand Woodworking, "A Visit to the Blacksmith: Tokyo."
- **[KG28]** StewMac, "Japanese Flush-cut Saw."
- **[KG29]** Ed Pirnik, "Reinforce Mortise-and-Tenon Joinery with Square Pegs," Fine Woodworking (2015).
- *Removed from load-bearing use:* [KG5]/[KG6] (blog; "most widely adopted in the West"), [KG13] (retailer "without scratching" copy), [KG15] (blog depth cap), [KG17] (JAANUS, not rendered), [KG18] (secondary museum visit report), [KG19] (Odate book, page not retrieved), [KG20]/[KG21] (sashimono and bamboo-nail pages used for the removed "no iron" origin claim), [KG23] (internal cross-reference).

## The reviewer's corrections (12)

- `BLOCKER` — 1. Scope the finger-on-blade technique to a blade with a verified safe handling area — Exact claim: “use your fingers to both press the blade flat against the work and to move the blade back and forth,” repeated in the Correct use section and represented in Image 3 as “fingers pressing blade flat.”
- `SHOULD-FIX` — 2. Remove the universal one-eighth-inch depth limit and absolute “any deeper” language — Exact claim: “Any cut deeper than a shallow flush trim—it binds,” supported by one user’s “eighth deep or so,” plus “not for any cut deeper than a shallow trim” and “the kugihiki ... generally cannot” cut deeper.
- `SHOULD-FIX` — 3. Correct fixed-blade versus replaceable-blade classification — Exact claim: The variations, named houses, proof, access, and kit sections present the replaceable `kae-ba` form as the modern default while repeatedly using Gyokucho 1150/1151 among the reference examples.
- `SHOULD-FIX` — 4. Change scratch-proof language into risk-reduction language — Exact claim: “flush without a scratch,” “without leaving a scratch,” “safe face,” and the thesis that this is “one saw whose defining feature protects the workpiece instead of improving the cut.”
- `SHOULD-FIX` — 5. Separate naming evidence from pull-stroke and origin claims — Exact claim: `kugi` is glossed as peg/nail and `hiki/biki` as “to saw / cut on draw,” while the human-side thesis derives the tool from a culture that fastened visible furniture and architecture with wooden and bamboo pegs “instead o …
- `SHOULD-FIX` — 6. Do not turn a public catalogue digest’s omission into proof of museum absence or naming drift — Exact claim: “The residual ... is STRUCTURAL,” “There is no 釘挽 category anywhere in it. So the catalogue most likely holds no object accessioned as a kugihiki,” and “the residual is ... the naming drift itself.”
- `SHOULD-FIX` — 7. Scope hardness, tooth damage, and resharpenability to documented models — Exact claim: Consumer blades are “~RC 67+ ... disposable, not resharpenable”; a nail “chips or snaps them instantly”; and filing an impulse-hardened `kae-ba` blade is categorically impossible.
- `SHOULD-FIX` — 8. Rebuild the safety section from current manufacturer guidance — Exact claim: The safety section centers on a repeated lack of first-person laceration reports and speculates that risk may be “attenuated” because the cut is shallow and low-force.
- `SHOULD-FIX` — 9. Remove model/orchestration narration and stale run artifacts from the durable entry — Exact claim: “directly verified by Haft this run,” “Run 140,” “the model directly rendered,” “read in full,” “first pass,” “the model,” “NEEDS JONATHAN’S EYES,” research passes-search descriptions, and repeated references to prior pull-saw ent …
- `SHOULD-FIX` — 10. Split confidence by claim and lower historical assertions — Exact claim: The file’s overall status is “MEDIUM-HIGH” because the modern form is documented while the historical object remains unaccessioned.
- `SHOULD-FIX` — 11. Narrow unsupported trade, adoption, and “true kugihiki” claims — Exact claim: “above all” sashimono-shi and tategu-shi, temple carpenters trimming pegged architectural joinery, “among the most-adopted Japanese saws in the West,” and a one-sided-set Western flush saw is “not a true kugihiki.”
- `MINOR` — 12. Tighten material scope, anatomy ranges, and maintenance claims — Exact claim: “~0.2–0.5 mm on the common flush saws,” a category “up to ~0.9 mm,” “17–30 TPI across models,” “standard Japanese practice: a soft-iron tang,” and fixed statements about dust causing wandering and mar.