Mitsubishi Kogyo is separately recorded in the 1953–54 and 1978–79 registers. Mitsubishi Kogyo Cement, also Mitsubishi Mining & Cement, is associated with a 1 December 1956 foundation date, which Rosanoski assumes refers to the original company. Its fleet, formerly using Ryoyo Maru with numbers, passed to Mitsubishi Materials by 1996–97 and then to Mitsubishi Kagaku Butsuryo by 2000. The latter, also Mitsubishi Chemical Logistics, was formed in 1996 as a wholly owned Mitsubishi Chemical subsidiary.
Keep the explicit scope label independent; no alias or company identity is inferred.