British Occupational Forces of JapanBritish Occupational Forces of Japan Full size medal Unmounted with 15cm ribbon as required for swing mounting. Miniature size medal Unmounted with 10cm ribbon as required for swing mounting. The British Commonwealth Occupational Forces (BCOF) was issued by the British Commonwealth Occupational Forces Association to any veteran who had served one day on the strenght of the unit with the Commonwealth Forces. The British Commonwealth Occupational Forces