[Hirokawa Kouichirou] PET LIFE
[Hirokawa Kouichirou] Deep Trip
[Hirokawa Kouichirou] Deep Trip
[Hirokawa Kouichirou] Deep Trip
[Hirokawa Kouichirou] PET LIFE (CHINESE)
(Comic Market Special 5 in Mito) [OVACAS (Hirokawa Kouichirou)] Haru Matsuri Chichi Matsuri 2010
[Hirokawa Kouichirou] Deep Trip | 銷魂之旅 [Chinese]
(C73) [OVACAS (Hirokawa Kouichirou)] Banchou Densetsu (Minami-ke) [Chinese]
(C69) [OVACAS (Hirokawa Kouichirou)] MAI-CCHING (My-HiME) [French]
(C67) [OVACAS (Hirokawa Kouichirou)] HIME-hajimeru [French]
(C80) [OVACAS (Hirokawa Kouichirou)] A STYLE. (A Channel)
(CT20) [OVACAS (Hirokawa Kouichirou)] Bouhatei no Onna. (Joshiraku)
[Yumeizukosya, OVACAS (Hirokawa Kouichirou)] Ebisu Taisen (Sakura Taisen)
(C84) [OVACAS (Hirokawa Kouichirou)] Kedamono-tachi no YAMATO. (Space Battleship Yamato 2199)