KanjiJLPT N1
Dipper

Big Dipper, ten sho (vol), sake dipper, dots and cross radical (no. 68)

Mnemonic

Dot and a sweeping handle around a ladle shape — a dipper.

Details

The keyword for 斗 is dipper. This kanji refers to a ladle or dipper used for scooping liquids, and it also represents the Big Dipper constellation in the night sky. Historically, it was used as a unit of volume measurement in East Asia, equivalent to about 18 liters in Japan. The character's shape evokes the image of a long-handled scoop or ladle.
On'yomi
と、とう