Hawaii-based shipping company Matson Inc. is launching direct service between Honolulu and the Republic of the Marshall Islands next year that will shorten cargo service to the island nation from the Mainland by as many as eight days.

The new route will be operated twice a week and serve the ports of Kwajalein, Ebeye and Majuro, using a smaller, U.S.-flagged 707-TEU containership for the new service, starting in the first quarter of 2018. Matson has served the Marshall Islands for 45 years from…