Japan has offered to assist Indonesia in accomplishing its ambitious plan of relocating the national capital to the forests of Borneo.

The offer was made during a closed-door meeting between Hiroto Izumi, special adviser to Prime Minister Shinzo Abe, and Indonesian Coordinating Minister for Maritime and Investment Affairs Luhut Pandjaitan on Tuesday evening, a source with knowledge of the meeting said Wednesday.

Along with some Japanese businessmen, Izumi is on a three-day visit to Indonesia from Tuesday as part of a delegation led by former Prime Minister Yasuo Fukuda.