yellow license plate (for private-use light motor vehicles)
Refers specifically to the yellow plate with black characters used on privately owned light motor vehicles (軽自動車) in Japan. Often used in contrast with white plates for regular cars or black plates for commercial light vehicles.
See also: 軽自動車
Light motor vehicles have yellow license plates.
Cars with yellow plates have lower taxes.
Compound of 黄 (き, 'yellow') and ナンバー ('number', from English), referring to the yellow license plate. The term is a straightforward descriptive compound.