| June 1941 | Sanriku Unyu Co., Ltd. established, taking over the businesses of ground freight transport and marine cargo handling previously conducted by Sanrikukisen Co., Ltd. |
|---|---|
| December 1950 | Obtains a license for the sea-rail freight-forwarding business at Shiogama Port Station and Shiogama Wharf Station |
| December 1963 | Obtains a license for the trucking business in general areas |
| September 1964 | Obtains an unrestricted license (no.1 category) for Port Transport Business. |
| December 1964 | Files registration for the coastal freight-forwarding business |
| April 1970 | Relocates the head office to 11-28 Teizan-Dori 3-chome, Shiogama, Miyagi Prefecture (current location) |
| September 1970 | Obtains a permit for the warehousing business |
| July 1971 | The Sendai Zone of the Port of Sendai-Shiogama opens |
| March 1973 | Opens the Sendai Port Office when Sendai Port opens |
| August 1975 | Obtains a license for the sea-land freight-forwarding business at Sendai Wharf Station |
| April 1976 | Files registration for the business of freight forwarding by automobile |
| March 1977 | Establishes the subsidiary Sanriku-Yuso Corp, which conducts the trucking business in general areas |
| October 1986 | Obtains an unrestricted license for the marine cargo handling business |
| July 1987 | Installs a 50-ton scale on the wharf of Shiogama Port and starts the truck-weight certification business |
| March 1990 | Obtains a permit for the customs brokerage business |
| December 1990 | With the enactment of the Freight-Forwarding Business Act, which abolishes the classification of the general freight-forwarding business, the Company is deemed to have been granted a permit and registration for the coastal and truck freight-forwarding businesses. |
| May 1993 | Obtains a permit for the rail freight-forwarding business (second-class consigned freight-forwarding business) at Sendai Port Station |
| April 1997 | Discontinues the rail freight-forwarding business when Shiogama Wharf Station is closed |
| October 1997 | Returns the license for the trucking business in general areas |
| April 2001 | Shiogama Port reclassified as a special major port and renamed the Port of Sendai-Shiogama |
| May 2003 | Establishes the subsidiary Sanriku Service Co., Ltd., which conducts staffing services and the property and casualty insurance agency business |
| October 2005 | Opens Sendai Port Office No. 3 |
| October 2006 | Opens the Tokyo Office (currently Tokyo Branch) |
| March 2009 | Certified to Green Management standards |
| August 2009 | Opens Sendai Port Office No. 5 |
| October 2012 | Ishinomaki Port and Matsushima Port merged into the Port of Sendai-Shiogama |
| March 2013 | Opens Sendai Port Distribution Center on the premises of Sendai Port Office No. 5 |
| February 2014 | Certified as an AEO (authorized economic operator) Warehouse Operator by the customs authorities |
| March 2014 | Obtains a license for the first-class consigned freight-forwarding business and starts the NVOCC (non-vessel-operating common carrier) services |
| June 2015 | Obtains a license for the general trucking business |
| March 2016 | Opens the Sendai Port North Office |
| June 2019 | Certified as an AEO (authorized economic operator) Customs Brokers by the customs authorities |
| October 2019 | Opens Sendai Port Gamo Office |
| January 2023 | Opens a new office building at the Sendai Port North Office |
| March 2023 | Relocated Head Office functions to Sendai Port Office |
| March 2023 | Sendai Port Office renamed Sendai Port Head Office The former Head Office renamed Shiogama Office |