Makuzure (間崩れ) – a situation in which a column does not stand in the clean 3 shaku (910 mm) pattern, but instead falls at an arbitrary point somewhere before or after. Here in Japan, columns are labeled in pairs of 1 hiragana character followed by a number. These pairs follow a diagram and allow house-builders to quickly distribute the columns to the corresponding locations.
By looking at the diagram below you can see that it’s two dimensional with hiragana going across and numbers (in Japanese) going down. Makuzure is shown in the diagram as the pink square slightly left of the center — it obviously breaks the pattern. Makuzure, though often necessary for design purposes, results in more wasted materials due to the non-standard span.