Jayforce

J Force
Lieutenant General John Northcott, commander-in-chief of the BCOF, inspects an honour guard of New Zealand troops in Japan, April 1946
Active	1946–48
Country	New Zealand
Type	Occupation force
Size	4,000
Part of	BCOF

J Force (sometimes referred to as "Jayforce") was the name given to the New Zealand forces that were allocated to the British Commonwealth Occupation Force (BCOF) which occupied Japan following the end of the Second World War. The force was deployed between 1946 and 1948, after which it was disbanded and its personnel repatriated to New Zealand.

Upon the surrender of Japan which ended the combat phase of the Second World War, Allied Forces, including New Zealanders, Australians, Canadians, and Indians, entered Japan as an occupying force in February 1946 to restore the peace, clean up debris from the atomic blast, help rebuild and direct Japan into becoming a democratic society. Within a week of the surrender Britain invited New Zealand to participate in the occupation of Japan. Due to its weakened condition at the end of the war Britain lacked the resources to provide a force by itself and it wanted members of Commonwealth to help supply sufficient numbers to show the United States that it was still a major power. On 21 August 1945 the New Zealand government agreed to contribute both a land and an air contingent.

The army contribution which consisted of both male and female members was made through a number of drafts. The initial contingent of the NZEF (Japan) was formed in Florence, Italy, on 19 November 1945. This was intended to provide the initial occupation force until a special occupation force could be created in New Zealand.

Prime Minister Peter Fraser wanted the 5,000-strong contribution to be drawn from single male volunteers from the 2NZEF. However, its commander, Lieutenant-General Sir Bernard Freyberg, did not believe this would provide sufficient numbers. As a result, all single non-Maori men from the 13th, 14th and 15th Reinforcements were conscripted for the force. Volunteer officers, and specialists from earlier reinforcements as well as any Maoris who wished to volunteer were allowed to make up the required numbers. As a result, a large number of this draft were very unhappy that after having survived the war they were going to Japan instead of home.

The force of just over 4,000 men was built around the 9th Infantry Brigade Group, and was placed under the command of Brigadier K. L. Stewart, who was later replaced by Brigadier W. G. Gentry. The initial draft consisted of two infantry battalions—the 27th and 22nd Battalions—as well as the 2nd Divisional Cavalry Regiment, the 25th Field Battery, and the 5th Engineer Company along with supporting elements which included signals, transport, workshops and medical units. Among the first draft were 36 Women's Army Auxiliary Corps personnel (WAACs) and 30 women from the New Zealand Army Nursing Service (NZANS). All were volunteers. The Royal New Zealand Air Force had no problems filling the initial 24 flying positions and 250 support staff positions from over 1,500 applications.