This article is about a/an writer in Kamen Rider Gaim.
Gan Sunaaku (砂阿久 雁 Suna'aku Gan, Gun Snark) 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 the script for episode 10 of Kamen Rider Gaim, and is the co-writer of Kamen Rider Gaim (novel) alongside Jin Haganeya, and supervised by their nitro+ coworker Gen Urobuchi.