Navigator Holdings has clinched four new charters to export propane from Canada.

The US-listed company has signed a deal for the handysize ships for a period of 12 months to lift gas for Japan's Mitsui & Co at a new terminal in Prince Rupert.

The facility is operated by Pembina Pipeline Corp in British Columbia.

The four semi-refrigerated ships are expected to start their charters with Mitsui from the second half of May, but no financial details have been revealed.