Jan 16 (Reuters) – Aluminium stocks held at three major Japanese ports rose about 3 percent to 241,900 tonnes by end-December from the previous month, trading house Marubeni Corp said on Tuesday. Marubeni collects data from the ports of Yokohama, Nagoya and Osaka. All figures in tonnes: Dec 2017 Nov 2017 Dec 2016 Yokohama 115,400 117,300 128,500 Nagoya 111,500 102,600 132,000 Osaka 15,000 15,000 15,000 Total 241,900 234,900 275,500