Keitarō Arima(有馬 啓太郎Arima Keitarō) is a mangaka born on January 13, 1969. He was a member of the Manga Dōkōkai OB at Kansai University. His pen names include Pitarō Arima(有馬 秘太郎Arima Pitarō), Haruo Arima(有馬 晴臣Arima Haruo) and Pīttarō Arima(有馬 ピーッ太郎Arima Pīttarō).
Keitarō Arima(有馬 啓太郎Arima Keitarō) is a mangaka born on January 13, 1969. He was a member of the Manga Dōkōkai OB at Kansai University. His pen names include Pitarō Arima(有馬 秘太郎Arima Pitarō), Haruo Arima(有馬 晴臣Arima Haruo) and Pīttarō Arima(有馬 ピーッ太郎Arima Pīttarō).