Nisshin Shipping of Japan has quietly beefed up its growing fleet with handysize bulker newbuildings.

The low-profile shipowner is said to have at least a dozen 39,000-dwt bulkers under construction at Jiangmen Nanyang Ship Engineering.

Officials at both the Chinese shipyard and the shipowner declined to comment.

A shipbuilding source familiar with Nisshin said the company began building ships at Jiangmen Nanyang in 2013.