All about Koike Teppei 小池徹平 Born on January 5, 1986, actor Koike Teppei is also a singer and forms half of the duo, WaT. His partner is friend Wentz Eiji, whom he calls Ei-chan. Originally from Osaka, Teppei (Teppei-chan, Teppei-kun or Te-chan) moved to Tokyo in 2002, a year after he won the 14th Junon...