The word for Indonesia in Japanese is Indoneshia (インドネシア) and Jakarta is Jakaruta (ジャカルタ). Find more translations about Indonesia here.
Interesting facts about Indonesia and Japan
Diplomatic relations between Japan and Indonesia were first established in 1958. Today Japan is Indonesia’s largest trading partner and they are also a major development aid donor. Japan is also heavily dependent on Indonesia’s liquefied natural gas. The two country’s have also recently established military relations as both Japan and Indonesia have joint military exercises with Australia and the United States.