The Misunderstanding About Kumiko (組子)

The last piece showed that the shoji's crisp neatness comes from where the paper goes and from the shadows the climate made.

There's one more common trap when people talk about Japanese lattice. They put kumiko (組子) next to Korean lattice patterns and decide that "Japanese lattice is far more refined."

The short answer: the comparison picks the wrong thing from the start. What should be compared with Korean changho is not kumiko. It's the shoji (障子).

People often use "kumiko" as if it were the name of a Japanese lattice pattern. It isn't the name of a changho or a door.

It's the name of a woodworking technique: cutting grooves into wood and fitting the pieces into geometric patterns without nails.

It's sometimes used in shoji, but it's a specialist field that runs across woodwork in general, furniture and decorative pieces included. The paper lattice changho actually used in ordinary Japanese homes is the shoji.

To compare everyday changho, compare changho with changho, not with a technique. Setting kumiko, a specialist craft, beside everyday Korean lattice is a mismatch from the start.

Match the weight classes and it becomes clear the two countries' changho were solving different problems.

A Korean changho was part of the outer wall and met wind and rain head-on. So the joinery itself carries both mechanics and meaning.

1. Eogeum-yukmo-sal: the slats step out of line to form hexagons. Beyond a simple horizontal-and-vertical crossing, it adds a diagonal, spreading out force from three directions. Grooves and joinery alone make a structure that resists warping.
2. Gyo-sal: slats crossed tightly at 45° to weave a net of diamonds. The diagonals look rich, and they also spread the stress on the door panel in every direction.
3. Manja-sal (卍): a character written in lattice. The turns of one continuous line carry a wish for prosperity and long life.
4. Gwigap-sal (tortoise-shell lattice, also called geobuk-sal): the geometry of a tortoise shell, a sign of long life and protection. A byeoksa joinery meant to keep bad forces outside the door.

Korean makers left the wood room to move, a margin for warping, so it could breathe and settle through the seasons. Inside, they built in structure like eogeum-yukmo or gyo-sal. Soft outside, strong inside.

The shoji starts from different conditions.

Japan is hot and humid, and wood there shrinks and swells hard. A precise grid of thin slats warps easily when the humidity changes.

So the shoji settled in as an interior fitting. It could only last inside, once the eaves and the amado (rain shutters) had filtered out the wind, rain, and damp.

Freed from carrying structural load, the shoji was standardized as a fitting sized to the tatami module.

Its orderly grid, and the shadow made by light spreading through washi paper, later became central to Japanese architectural beauty. This is the background to Tanizaki Jun'ichiro finding Japanese beauty in shade rather than light, in In Praise of Shadows.

Its variations grew in the same direction, toward handling light and space. Yokoshige uses the grid's proportions to control light. Yukimi shoji brings the garden into the room at seated eye level.

To sum up: pulling in kumiko, a specialist craft, to argue that Japanese lattice is superior confuses a specialist craft with everyday changho.

And a fair comparison doesn't show better and worse. It shows different directions.

The shoji, in a spot sealed off from damp, worked on how to stage light and space, and arrived at a beauty of standard sizes. The Korean changho, standing where it met nature directly, packed structure and the meaning of byeoksa and gilsang into a single piece of lattice joinery.

The refinement of a Korean changho isn't on the surface. It's on the inside of the joinery. Change the standard of comparison, and that refinement simply can't be seen.