Niwa (Osamu Dazai book), a book by Osamu Dazai

Niwa (Ryūnosuke Akutagawa book), a book by Ryūnosuke Akutagawa

Niwa District, Aichi, a district in Japan

Niwa clan - retainer clan of the Oda clan during the Sengoku period of Japan

The National Institute of Water and Atmospheric Research in New Zealand

Daisuke Niwa, Emiko Niwa, Kosuke Niwa or Daiki Niwa - The family of phantom thiefs from DNAngel

Niwa, a village in Lower Silesian Voivodeship, south-west Poland