A Japanese Government source says Tokyo has decided not to invite the Fiji interim Prime Minister, Frank Bainimarama, or other senior members of the regime to its summit with Pacific island nations later this month in Hokkaido.
The Kyodo World News Service reports Japan made the decision due to the increasingly dictatorial nature of the unelected military regime and to the international community's response to the situation.
The decision follows the Pacific Islands Forum's suspension of Fiji from the 16-nation grouping earlier this month.
A summit between Japan and the Forum is to held in the village of Shimukappu in Hokkaido on May 22-23.
The source says that Fiji is arranging to dispatch a non-Cabinet level delegation to the summit.
Japan has hosted a summit with the Forum every three years since 1997.