Niwa (surname) explained
Niwa is a Japanese surname. Notable people with the surname include:
- Niwa clan, retainer clan of the Oda clan during the Sengoku period of Japan (1603 – 1868)
- Niwa Nagaaki, Daimyō of Nihonmatsu, 1796 – 1813
- Niwa Nagahide, Daimyō of Shirakawa
- Niwa Nagahiro, Daimyō of Nihonmatsu, 1868 – 1871
- Niwa Nagakuni, Daimyō of Nihonmatsu, 1858 – 1868
- Niwa Nagashige, Daimyō of Shirakawa, 1628 – 1638
- Niwa Nagatomi, Daimyō of Nihonmatsu, 1813 – 1858
- , Japanese curler, 1998 Winter Olympics participant
- Daiki Niwa (footballer), Japanese footballer
- Hideki Niwa, Japanese politician
- Koki Niwa, Japanese table tennis player
- Mikiho Niwa, Japanese actress
- , Japanese samurai and daimyō
- Ryuhei Niwa, Japanese footballer
- , Japanese footballer
- Uichiro Niwa, Japanese diplomat and businessman
- Yasujiro Niwa, Japanese scientist
- Yuya Niwa, Japanese politician