Annual profit for Japanese shipowning giant Mitsui OSK Lines more than doubled last year and topped $1bn, thanks to incredible earnings from its containerships.

Profit for the 12-month period ended 31 March totalled ¥133.6bn ($1.2bn), up from its previous annual result of ¥78.5bn.

This came despite annual revenue shrinking by 14% year on year to ¥991.4bn.