List of Famous people who are 21

Koki Yamaguchi is a professional Japanese baseball player. Selected in the fourth round of the 2018 NPB Draft from Meioh High School in Akita Prefecture, he plays outfield and first base for the Chiba Lotte Marines.

Kikai Sentai Zenkaiger is a Japanese tokusatsu television drama, the 45th entry in Toei's long-running Super Sentai series, and the second produced in the Reiwa era. Additionally, it commemorates the 45th anniversary of the Super Sentai franchise and is the second special anniversary series following Kaizoku Sentai Gokaiger.

Jon Taylor is an American re-recording mixer. He has been nominated for four Academy Awards in the category Best Sound Mixing. He has worked on nearly 120 films since 1989. He won two Emmy Awards for Outstanding Sound Mixing for the television show Flipper in 1996–1997.