Kumiko Asanoha Strip Length & Bevel Jig Calculator
Calculate exact infill piece lengths, bevel paring jig angles (45°, 22.5°, 67.5°), piece counts, and total strip stock for traditional Asanoha (hemp-leaf) Kumiko panels.
Includes +0.8mm paring allowance on rough lengths for final chisel beveling inside your jig.
Diagonal Cross Pieces (45° Jig)
56.6 mm
24 Pieces (2 per cell)
Hinge Pieces (22.5° & 67.5°)
21.6 mm
96 Pieces (8 per cell)
Live Asanoha Cell Geometric Star Blueprint
Asanoha Kumiko Infill Piece Length Reference Chart (3.2mm Strip)
Pre-calculated diagonal and hinge (tsunagi) finished lengths across popular square Kumiko grid sizes.
| Clear Cell Opening | Diagonal Piece (45° Double Bevel) | Hinge Piece (22.5° / 67.5° Bevel) | Stock Per Cell |
|---|---|---|---|
| 30 × 30 mm | 42.4 mm | 16.6 mm | 265 mm |
| 40 × 40 mm | 56.6 mm | 21.6 mm | 345 mm |
| 50 × 50 mm | 70.7 mm | 26.6 mm | 425 mm |
| 60 × 60 mm | 84.9 mm | 31.6 mm | 508 mm |
Asanoha Kumiko Geometry & Bevel Stop Block Settings
The classic Japanese Asanoha (hemp leaf) motif divides a square grid cell into 16 triangles using two central diagonal cross strips and eight shorter locking hinge pieces (tsunagi). When the 22.5° and 67.5° bevels are pared accurately, the eight hinge pieces gently flex the outer grid strips outward, locking the entire pattern together with zero glue.
Frequently Asked Questions (Kumiko Asanoha Jig Calculator)
What are the three bevel jig angles required for an Asanoha Kumiko pattern?
Traditional Asanoha (hemp leaf) Kumiko requires three precise bevel paring jigs: 45 degrees for the two diagonal cross pieces, 22.5 degrees for the long acute tips of the hinge pieces, and 67.5 degrees for the center meeting ends.
How many individual wood pieces are inside one Asanoha Kumiko cell?
Each square Asanoha grid cell contains 10 infill pieces: 2 full-length diagonal pieces joined at the center with a half-lap notch, and 8 shorter hinge (tsunagi) pieces that form the hemp-leaf star.
How do you calculate the diagonal piece length in a Kumiko square?
Multiply the clear inside cell opening by the square root of 2 (1.4142), then add 1mm to 1.5mm of paring allowance so you can dial in a friction-fit bevel with a sharp chisel or block plane.
What tool is best for paring Kumiko bevel angles in a jig?
A wide 36mm to 42mm Japanese slick chisel (usu-nomi) or a razor-sharp low-angle block plane riding flat against hard maple or brass-faced bevel guide blocks produces repeatable air-tight joints.
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