需 means “demand, need”

じゅ · ju

Also: request

On'yomi (Chinese reading)
ジュ

JLPT N1 · Taught in secondary school · 14 strokes

The story

Rain (雨) over 而: the oldest dictionary reads 需 as being caught in the rain and having to wait. Waiting on what you lack became need: 需要 is demand, as in 需要と供給, supply and demand, and 必需品 are the necessities.

Used in 需要 (juyou, demand), 必需品 (hitsujuhin, necessities), and 内需 (naiju, domestic demand)

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Readings from KANJIDIC2, © EDRDG, CC BY-SA.