On 25 December 1941, British forces in Hong Kong surrendered to Japan following several days of fierce fighting. From 1942, Japanese revenue stamps were used in Hong Kong, and these can only be identified by their cancellations. In 1943 and 1944, Japanese postage or revenue stamps were overprinted for Hong Kong. New designs were also issued printed locally, showing either the HSBC building (then the government headquarters) or Mount Fuji.