Check for characters missing birthday info here.
January
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Akira Midousuji
February
-
Hajime Aoyagi
March
-
Juichi Fukutomi
-
Sakamichi Onoda
April
-
Yasutomo Arakita
May
-
Shunsuke Imaizumi
-
Sangaku Manami
-
Eikichi Machiyama
June
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Koutarou Ishigaki
July
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Yuusuke Makishima
-
Hayato Shinkai
August
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Jinpachi Toudou
-
Shoukichi Naruko
December
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Shingo Kinjou
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Shingo Kinjou (young)