Dec 19 (Reuters) - Aluminium stocks at three major Japanese ports slipped 3.3% to 330,000 metric tons as of end-November, from 341,300 metric tons the prior month, Marubeni Corp said on Tuesday.

Marubeni collects data from the ports of Yokohama, Nagoya and Osaka. (Reporting by Brijesh Patel in Bengaluru; Editing by Jacqueline Wong)