This class consists of TENZAN, SENZAN, KONZAN and RONSAN MARUs all completed between May and Sep ’29 for Dairen Kisen K.K. All were requisitioned by the IJN, TENZAN and SENZAN MARUs converted to auxiliary transports and KONZAN and RONZAN MARUs to emergency tankers. All were bombed or torpedoed and sunk between Jul ’42 and Jul ’44.
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