This article is about a/an writer in Kamen Rider Gaim.
Gan Sunaaku (砂阿久 雁 Suna'aku Gan) is a Japanese writer associated with the company nitro+.

As a writer, he is well known for his work in the manga Attack on Titan: No Regrets, an spin-off manga of Attack on Titan.

He has helped Gen Urobuchi in writing script for episode 10 of Kamen Rider Gaim, and is the writer of Kamen Rider Gaim (novel), supervised by by his nitro+ coworkers Jin Haganeya and Gen Urobuchi.