mountain fold
In origami, a fold that creates a raised ridge, like a mountain peak. The opposite of a valley fold (谷折り).
When making a crane with origami, first learn mountain folds and valley folds.
Standard spelling with okurigana.
Abbreviated spelling without okurigana; also used in origami contexts.
Compound of 山 (mountain) and 折り (fold), referring to the mountain-like raised shape of the crease.