Ka kammala wannan jumla: Bayan harin bam a Hiroshima da Nagasaki a shekara ta 1945, Sarkin Showa
ya sanar da mika wuya ba tare da wani sharadi ba ga sojojin kawance. A cikin shekaru biyu masu zuwa, Japan da Janar Douglas MacArthur na Amurka sun ba da haɗin kai wajen tsara sabon kundin tsarin mulki, wanda Majalisar Wakilai ta amince da shi a ranar 24 ga Agusta, 1946, da Majalisar Peers a ranar 6 ga Oktoba, da kuma Majalisar Privy a ranar 29 ga Oktoba, sannan Sarkin ya ba da izini a ranar 3 ga Nuwamba, 1946, ranar haihuwar Sarkin Meiji, kuma ya fara aiki a ranar 3 ga Mayu, 1947.