Home : Staff : Office of Army Reserve Affairs-Japan

Welcome to the Office of Army Reserve Affairs-Japan

We are primarily responsible for advising the U.S. Army Japan (USARJ) commander and his staff on issues relating to the Army Reserve and Reserve components and for administering the Individual Mobilization Augmentee (IMA) program.

Many service members are surprised to learn that the U.S. Army has a sizable presence in Japan, and not many know about the Reserve IMA program. Together, these two segments offer a unique opportunity to qualified Army Reserve Soldiers to continue their military service in this amazing country.

USARJ traces its lineage back to U.S. Army Forces, Far East, which was formed in Manila, Philippines, in July 1941 under General of the Army Douglas MacArthur. Today, USARJ is the Army component command of United States Forces, Japan, providing a strategic forward presence, support for regional contingencies, and bilateral engagement with Japan.

If you are already assigned as a IMA or are interested in the IMA program, you should find answers to all your questions on this website regarding preparing for and training in Japan.



Phone number: DSN: 315-262-8510
Within Japan: 046-407-8510
From the U.S.: 011-81-46-407-8510
Fax number: DSN: 315-263-7778
Within Japan: 046-407-7778
From the U.S.: 011-81-46-407-7778
Mailing address: HQ USARJ
Unit 45005 (APAJ-RC)
APO AP 96343-5005


Email: Click here to send email

After Hours contact:
If you or a family member needs to urgently contact the Army Reserve Advisors office after hours, call the U.S. Army Japan command center at:


  DSN: 315-263-3123
Within Japan: 046-407-3123
From the U.S.: 011-81-46-407-3123


Or the American Red Cross at:

  DSN: 315-263-3166
Within Japan: 046-407-3166
From the U.S.: 011-81-46-407-3166