Bone Structure Body Type Test (骨格診断)

Bone structure typing (骨格診断 / kokkaku shindan) is a popular Japanese styling framework that sorts people into three body-frame types based on their skeletal structure and how flesh sits on it — not on weight or size. The three types are Straight (ストレート), Wave (ウェーブ) and Natural (ナチュラル).

This is a self-assessment quiz, not a medical or professional diagnosis. It uses 12 quick observations about your frame to estimate your dominant type, then suggests the silhouettes, fabrics and necklines that tend to flatter it.