noun
Historical term used primarily before and during WWII. Often appears in compounds like 日支事変 (the Japan-China Incident). The reading にっし is specific to this compound; 日 is read にっ due to assimilation.
See also: 日支事変
日支事変は1937年に始まった。
The Japan-China Incident began in 1937.
戦前の新聞には「日支」という表記がよく見られる。
The notation '日支' is often seen in pre-war newspapers.