| 1934 | Inoske Nakanishi forms the Nakanishi-gumi group to carry out stevedoring work at the Port of Osaka that includes Tochiki Kisen Co.,Ltd. |
| 1949 July | Takatoshi
Nakanishi takes over the Nakanishi-gumi group and
reorganizes it into a company, establishing Maruni Unyu Co.,Ltd. |
| 1959 April | A business tie-up is established at the Port of Osaka with the company that is today Nissin Corporation |
| 1964 | Harbor
transport business licenses are obtaines and registered ・ General harbor transport (unlimited) : Osaka Class 1,No.25 ・ Stevedoring (unlimited) : Port of Osaka Class 2,No.29 ・ Longshoring (unlimited) : Port of Osaka Class 4,No.48 |
| 1968 January | To strengthen the harbor transport division, a warehouse is built at Osaka Port Wharf No.3 |
| 1972 November | Maruni unyu
Co.,Ltd.'s harbor division is spun off and Marushin Koun
Co.,Ltd. is established. Marushin Koun Co.,Ltd. is establishes the Senboku Service Office. |
| 1976 April | Marushin Koun Co.,Ltd. is establishes the Nanko Service Office. |
| 1979 July | A 30th anniversary event is held at Takarazuka Bow Hall with the participation of all companies in the Maruni group (Maruni Unyu, Marushin Koun, Maruni Auto Service, Marunika, and Precision Machine Service) |
| 1984 April | Marushin Koun Co.,Ltd. is establishes the K-1 Service Office. |
| 1990 May | Marushin Koun Co.,Ltd. is establishes the Ittotsu Service Office. |
| 1997 November | A 25th anniversary event for Marushin Koun Co.,Ltd is held at Takarazuka Grand Hotel |
| 2001 August | Marushin Koun Co.,Ltd. is establishes the Sukematsu Service Office. |
| 2005 October | Takatoshi Nakanishi becomes chairman of Marushin Koun Co.,Ltd. and Tokio Nakanishi takes over as president |
| 2009 April | Marushin Koun Co.,Ltd. is establishes the Sakaihama Service Office. |
| 2012 March | Customs broker authorization obtained; Customs authority:Osaka Customs |
