Series Beginning with K
- Koe Girl!
- Koe Man
- Koetsu Girl Series
- Kofuku Graffiti
- Kofun Gal no Coffy
- Koguma no Cake ya-san
- Koh Boh
- Koharu Biyori
- Koi ga heta demo ikitemasu
- Koi Ha Sekai Seifuku No Ato De
- Koi Iro Soramoyou
- Koi no Jikan
- Koi suru Lesson Series
- Koi suru Oukoku
- Koi to Producer -EVOL x LOVE-
- Koi to Senkyo to Chocolate
- Koi to Uso
- Koi to Yobu niwa Kimochiwarui
- Koi wa Ame agari no yo ni
- Koi wa Futago de Warikirenai
- Koi wa Tsuzukuyo Dokomademo
- Koi-Shimai
- Koihime Muso
- Koikaze
- Koikoi 7
- Koinaka
- Koisentai Love & Peace
- Koishite Akuma
- Koizora
- Kojak
- Kokkoku
- Kokkurisan
- Koko ga Uwasa no El Palacio
- Kokoro Atatamaru Monogatari
- Kokoro Connect
- Kokoro ga Pokittone
- Kokoro ni Hibiku Monogatari
- Kokoro toshokan
- Kokosei Restaurant
- Kokucho no Psychedelica
- Kokuhatsu
- Kokurikozaka Kara
- Komaneko
- Komi Can't Communicate (Komi-san wa, Komyusho Desu.)
- Komori-san Can't Decline
- Komyogatsuji
- Konda Teru no Goho Recipe
- Konjiki no Gash!!
- Konkatsu
- Konkatsu Deka
- Konnichiwa Anne: Before Green Gables
- Kono Aozora ni Yakusoku wo
- Kono Kaisha Ni Sukina Hito Ga Imasu
- Kono Koi wa Tsumi nanoka!?
- Kono Minikukumo Utsukushii Sekai (This ugly and beautiful world)
- Kono Mune Ippai no Ai wo
- Kono Naka ni Hitori, Imoto ga Iru!
- Kono Oto Tomare!
- Konodori
- Konohana Kitan
- KonoSuba: God's Blessing on This Wonderful World!
- Konoyo no Hate de Koi wo Utau Shojo YU-NO
- Konpeki no Kantai
- Konshu Tsuma ga Uwaki Shimasu
- Konya Hitori no Bed de
- Kore Ha Keihi De Ochimasen!
- Kore wa Koi no Hanashi
- Kore wa Zombie desu ka? (Is This a Zombie?)
- Korean Wave
- Korokoro Mameshiba
- Koroshiya-san
- Koryaku Wanted!
- Koshaku Reijo no Tashinami
- Koshoku Robot
- Kosoku Sentai Turboranger
- Kotetsu Sangokushi
- Koto no Ha no Niwa
- Kotoba Erabi Jiten
- Kotobazeme CD
- Kotodama Shoujo Project
- Kotoura-san
- Koukou Nyushi
- Koukou Yakyu
- Koupen-chan
- Kowarekake no Orgel
- Kowloon Generic Romance
- Koya no Kotobuki Hikotai
- Koyomo Pearl Pink Series
- Koyomo setsugekka hana Series
- Koyomo setsugekka tsuki Series
- Koyomo setsugekka yuki Series
- KOYUDO Casual Series
- KOYUDO Casual Short Series
- Koyudo CW Series
- KOYUDO Hitosoroe Series
- Koyudo HQ Series
- KOYUDO Kakishibuzome Series
- KOYUDO La Fuga del Gatto Series
- KOYUDO limited Series
- KOYUDO Makiko Series