Nakai
The taxon authority Nakai may refer to:
- Fusaka Nakai (19..; F.Nakai), Japanese botanist and mycologist
- Hideki Nakai (born 1956; H.Nakai), Japanese botanist
- Kei M. Nakai (born 1954; K.M.Nakai) - Japanese botanist
- Koji Nakai – Japanese zoologist and ichthyologist
- Takenoshin Nakai (1882–1952; Nakai) – Japanese botanist