I te 15 o Akuhata 1945, i Maizuru, Japan, te "I-203" me ana kaipuke tuahine, i te wa i tukuna ai ia ki te Tari Submarine 15 i te 6th Fleet. I taua rā anō, ka mutu ngā pakanga i waenganui i Hapanihi me ngā Rōpū Whakakotahitanga. Kua tukua ā-ture a Hapani
i te huihuinga i runga i te kaipuke pakanga o te United States Navy i Tokyo Bay i te 2 o Hepetema 1945, a ka tukuna a "I-203" ki nga Allies i Maizuru i taua ra.