Artist: Hirokawa Kouichirou

(C55) [OVACAS (Various)] '98 Kagayake! Heppoko Anime Chinplay Kouplay (Various)

(SC32) [OVACAS (Hirokawa Kouichirou)] another day (Ojamajo Doremi)

(C62) [Märchen BOX (Various)] Aiko Paradise 3 (Ojamajo Doremi)

[Anthology] Denno Buto Musume 5 (Various)

(Puniket 6) [OVACAS (Hirokawa Kouichirou)] AxA (Ojamajo Doremi)

(Futaket vs. ABC ~Hentaisai~) [OVACAS (Hirokawa Kouichirou)] Gakuen Erotopia (Manabi Straight!) [English] [biribiri]

(C54) [OVACAS (Various)] Capricon 1 Director's Cut (Various)

(SC19) [Abellcain, OVACAS (Fujimaru Arikui, Hirokawa Kouichirou)] Rotation (Gundam SEED)

(SC16) [Ovacas (Hirokawa Kouichirou)] Nichiyou Asa no 8-ji 30-bu (Ojamajo Doremi)

(C66) [INFINITY-FORCE (Mercy Rabbit)] VS∞ VURSUS INFINITY (Capcom vs. SNK)

(C65) [OVACAS (Hirokawa Kouichirou)] FLOW MY TEARS A SENIOR SAID (Uchuu No Stellvia)

(C67) [OVACAS (Hirokawa Kouichirou)] HIME-hajimeru (My-HiME) [English] [SaHa]

(C61) [OVACAS (Hirokawa Kouichirou)] S.F.3.D (Various)

(C60) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH 3 (Various)

(C59) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH 2nd (Shin Megami Tensei Devil Children)

(CR27) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH (Various)

[OVACAS (Hirokawa Kouichirou)] Kashi 1114 (Ojamajo Doremi)

[Hirokawa Kouichirou] Deep Trip

[Hirokawa Kouichirou] A to Z

(C74) [OVACAS, Abellcain (Hirokawa Kouichirou, Fujimaru Arikui)] S.M.S ni Youkoso! - Welcome to the Strategic Military Services (Macross Frontier)

(C71) [OVACAS (Hirokawa Kouichirou)] BITCH STYLE (WITCHBLADE)

(C68) [OVACAS (Hirokawa Kouichirou)] MAI-CCHING (Mai-HiME) [English] [SaHa]

(Futaket vs. ABC ~Hentaisai~) [OVACAS (Hirokawa Kouichirou)] Gakuen Erotopia (Manabi Straight!)

(C68) [Abellcain, OVACAS (Fujimaru Arikui, Hirokawa Kouichirou)] Hutagodaka (Fushigi Boshi no Futago Hime)