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Songs about Kohgo:
Baba no Uta feat. Kohgo, Sky Word, Run Bird by J.T.C from the Album J.T.C
Goyouda! feat. Adachi Man & Kohgo by J-REXXX from the Album Kaizou Ningen J
Books about Kohgo:
Kohgo: Webster's Timeline History, 1980 - 2007 by Icon Group International (May 14, 2010)