Niwa
Niwa or NIWA can refer to:
- Niwa District, Aichi, a district in Japan
- National Institute of Water and Atmospheric Research of New Zealand
- Nintendo Independent Wiki Alliance, a group of independent fan wikis that focus on various Nintendo franchises.
- Niwa (Osamu Dazai book), a book by Osamu Dazai
- Niwa (Ryūnosuke Akutagawa book), a book by Ryūnosuke Akutagawa
- Niwa clan - retainer clan of the Oda clan during the Sengoku period of Japan
- Daisuke Niwa, Emiko Niwa, Kosuke Niwa or Daiki Niwa - The family of phantom thieves from DNAngel
- Niwa, Lower Silesian Voivodeship (south-west Poland)
- Niwa, Łódź Voivodeship (central Poland)
- Niwa, Puławy County in Lublin Voivodeship (east Poland)
- Niwa, Zamość County in Lublin Voivodeship (east Poland)
- Niwa, Lubaczów County in Subcarpathian Voivodeship (south-east Poland)
- Niwa, Tarnobrzeg County in Subcarpathian Voivodeship (south-east Poland)
- Niwa, Masovian Voivodeship (east-central Poland)
- Niwa, Opole Voivodeship (south-west Poland)