K
- Kagerou
- Kagrra
- Kaiden-Light
- Kairo
- Kaitou Sentai NUSUMUNGER (怪盗戦隊ヌスムンジャー)
- Kalimero
- Kamaitachi
- KAMELEO (カメレオ)
- THE Kanmuri (THE冠)
- Kannivalism
- Kanon
- Karasu
- Karma Shenjing
- Kaya
- Kazoku
- KEEL
- Kein
- Keloid
- KeLLy
- Kewpie
- The Kiddie
- Kilhi+Ice
- Killaneth
- Kiryu (己龍)
- Kisaki Project
- Kisnate
- Kitiku Ikka
- KIZU (キズ)
- KIZU (キズ) (The other, older, less known one)
- Koro
- KOU NO TORI (コウノトリ)
- Kozi
- Kra
- Kreuz
- Kro:nos
- Ku:
- Kuromikado (黒御門)
- KuroxHime
- Kuroyume
- Kuroyure To Kage
- Kurt
- Kuu
- Kyokutou Girl Friend
- Kyosuke Himuro (氷室京介)