Kaga, city, southwestern Ishikawa ken (prefecture), central Honshu, Japan. It lies along the Daishōji River, facing the Sea of Japan (East Sea). The city was created in 1958 by the amalgamation of the city of Daishōji with several towns, including the hot-spring resorts of Katayamazu and Yamashiro.

The former city of Daishōji is now the central part of Kaga. An old temple town, it grew around a castle built by the Maeda family in the early Edo (Tokugawa) period (1603–1867). Industrialization began after World War II; products include electrical machinery, pottery, silk and synthetic textiles, and bicycle parts.

Kaga is important as a tourist centre. The Enuma Shrine contains a tea-ceremony house founded by the master Kobori Enshū (1574–1647). There are several temples in the city, and its hot-spring areas and scenic surroundings are strong attractions for tourists. Pop. (2005) 74,982; (2010) 71,887.