Did the Japanese ever fight against other Asians?

Yes. The Japanese have a long history with various Asian countries and have fought against some of them at different times. Some examples include:

- The Mongol invasions of Japan (1274-1281): In the late 13th century, the Mongol Empire attempted to invade Japan, leading to several large-scale battles between Japanese and Mongol forces.

- The Imjin War (1592-1598): The Japanese invaded Korea in the 16th century, resulting in a significant conflict with Korean and Chinese forces.

- The Russo-Japanese War (1904-1905): Japan fought against the Russian Empire for control over certain regions in Manchuria and Korea.

- World War II: During World War II, Japan fought against various countries in Asia as part of its expansionist policies, including China, the Philippines, and other Southeast Asian nations.