The Self-Defense Forces will visit the Palauan island of Peleliu in mid-August as part of an annual U.S.-led humanitarian assistance exercise, the Defense Ministry said.
It will be the first visit by SDF troops to the Pacific island, the location of one of the fiercest battles of World War II.
An event to commemorate the war dead will also be held on the island.
The Pacific Partnership exercise, held since 2007, is aimed at enhancing ties between participating Asia-Pacific nations through humanitarian assistance and disaster relief preparedness missions.
Australia, Britain, Canada, Malaysia, New Zealand, Singapore and South Korea will also take part, the ministry said Wednesday.
The SDF will dispatch 70 members as well as the Maritime Self Defense Force's transport vessel Shimokita.
The SDF will take part in activities in Timor-Leste, Vietnam, Palau and Indonesia for between three and 18 days each. The Peleliu visit is slated for Aug. 11 and 12.
In 1944, the U.S. forces advanced to Japanese-occupied Peleliu where some 10,000 Japanese troops and over 1,000 U.S. soldiers were killed during a two-month battle.