Kôichi Igawa is known for Kyôtarô Nishimura's Travel Mystery 55 (2010), Kyôtarô Nishimura's Travel Mystery 57 (2012) and Kyôtarô Nishimura's Travel Mystery 56 (2011).
Kyôtarô Nishimura's Travel Mystery 57
Kyôtarô Nishimura's Travel Mystery 55
Kyôtarô Nishimura's Travel Mystery 56
Kyôtarô Nishimura's Travel Mystery 51
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