Fukaya (surname)
Fukaya (written: 深谷) is a Japanese surname. Notable people with the surname include:
- Kenji Fukaya (深谷 賢治, born 1959), Japanese mathematician
 - Michiyo Fukaya (1953–1987), American poet and activist
 - Takashi Fukaya (深谷 隆司, born 1935), Japanese politician
 - Yuki Fukaya (深谷 友基, born 1982), Japanese footballer