problem is those people stayed despite the Royal Surrender to fought for the land. they straggled because they wanted to and they've been taken care of by the locals. but hey i think you're right. those straggled IJA were no longer Japanese Citizens as they have become Indonesian Citizen by the time they fought for our Independence.
as quoted from my patriotic and brave comrade
well i guess i have to relate it to Indonesian Independence then, as it seems it would make no sense to you that i said the Surrender news reached them.
Indonesian Independence day is August 17th 1945. Japan surrenders just two days before the Proclamation of Independence
War for Independence: 1945 to 1950
August 7 BPUPKI renames itself to PPKI: Panitia Persiapan Kemerdekaan Indonesia.
August 9 Sukarno, Hatta, and Radjiman Wediodiningrat are flown by the Japanese to Vietnam to meet with Marshal Terauchi. There they are informed of the collapse of Japanese forces, and that Japan will grant Indonesia independence on August 24.
August 14 Sukarno, Hatta, and Radjiman Wediodiningrat return to Jakarta, mistrustful of the Japanese promise.
August 15 Japan surrenders to the Allies. The Japanese army and navy still control Indonesia. Japan has agreed to return Indonesia to the Dutch.
August 16 Sukarno and Hatta are spirited away by youth leaders, including Chaerul Saleh, to Rengasdengklok at 3:00 A.M. They later return to Jakarta, meet with General Yamamoto, and spend the next night at Vice-Admiral Maeda Tadashi's residence. Sukarno and Hatta are told privately that Japan no longer has the power to make decisions regarding the future of Indonesia.
August 17 Sukarno reads the brief, succinct, and unilateral
"Proklamasi";
the Declaration of Independence.