子安武人, Fami Aizawa (相沢ファミ), Suiko Akiyama (秋山水滸), Nayu Asahi (朝日奈悠), Keigo Fuji (藤景吾), Tatsuhiko Hououin (鳳凰院龍彦), Fuyutaka Itsuki (樹冬隆), Jack Cloud (ジャック・クラウド), Ran Jinshinno (壬申乱), Hayato Juumonji (十文字隼人), Yoshifusa Juunanajou (十七条良房), Kotori Kagura (神楽飛鳥), Kai
Date of Birth: May 5 1967 Place of Birth: Yokohama Kanagawa Japan Blood Type: A Height: 175 cm Weight: 60 kg BustWaistHip: 836593 cm Favorites Beverages: milk brandy Colors: black white blue Country: Egypt Animal: Giraffe Brands of clothing: Fila Donna Karan Van Ships Date spot: the sea Music group: LarcenCiel TV show: trendy dramas Flower: yellow rose Foods: ebi tofu mens pocky Idol: Mita Hiroko Season: Autumn Hobbies: snowboarding video Games writing Skills Abilities: baseball designing signatures Erank driver jump rope photography According to the Anime News Network as of December 2008 Koyasu is the most prolific seiy in Japan with voice acting roles in 365 anime series. He is also part of the seiy quartet Weiss consisting of Weiss Kreuz voice castmates Shinichiro Miki Tomokazu Seki and Yuuki Hiro. He used to work for Production Baobab but is now the head of Ts Factory a seiyuu company he founded in 1998. Koyasu is known for his deep smooth voice which often lands him in roles that are either villains or lonely bishnen. Recently though as in the cases of Mitsurugi Hanagata from Saber Marionette J Ryo Kuroyanagi from Yakitate Japan BoboboBoBobobo and Kei Itoshiki from Zoku Sayonara Zetsubo Sensei he has been voicing more and more lively/humorous characters. According to Hisaya Nakajo the mangaka of the series HanaKimi the character of Masao Himejima was designed with Koyasus voice in mind the seiy ended up voicing this character in the series drama CDs. Koyasu is also the creator of the Wei series and has authored the manga Wei Side B. In creating Wei Kreuz Koyasu was inspired by an old Japanese series called Sure Death. Koyasu often voices under the pseudonym Hayato Jumonji especially in H anime. He also narrates promotional videos and preflight safety videos for StarFlyer.