Upon the unconditional surrender of Japan to the Allies at the end of World War II, Wichitwathakan was arrested by the US occupying forces along with the German ambassador, Italian ambassador, and the entire Japanese cabinet.
After Japan surrendered unconditionally to the Allied powers at the end of World War II, Wichitwathakan was detained by the U.S. military along with the German ambassador, Italian ambassador, and the entire Japanese government.