Osaka-based Santoku Shipping Co has quietly expanded its fleet with two kamsarmax bulker newbuildings.

According to shipbuilding players, the privately-owned shipping company — also known as Santoku Senpaku, has two 82,300-dwt vessels under construction at Jiangsu Yangzi-Mitsui Shipbuilding Co (Yamic), a joint venture between Yangzijiang Shipbuilding and Japan's Mitsui E&S Shipbuilding.

Officials at Santoku and Yangzijiang declined to comment.

Shipbuilding players said Santoku did not order the pair but bought them from trading house Mitsui & Co early this year.