1946年には新憲法が公布されて1947年5月には施行されました。
名実ともに天皇には何の権限もなくなっていたはずですが、1947年9月には下記のような「天皇メッセージ」がGHQに伝えられたとのことです。今日の今日まで知りませんでした。
https://www.archives.pref.okinawa.jp/news/that_day/4730
… 内容は概ね以下の通りです。
（１）米国による琉球諸島の軍事占領の継続を望む。
（２）上記（１）の占領は、日本の主権を残したままで長期租借によるべき。
（３）上記（１）の手続は、米国と日本の二国間条約によるべき。
メモによると、天皇は米国による沖縄占領は日米双方に利し、共産主義勢力の影響を懸念する日本国民の賛同も得られるなどとしています。1979年にこの文書が発見されると、象徴天皇制の下での昭和天皇と政治の関わりを示す文書として注目を集めました。…
Enclosuer to Despatch No. 1293 Dated September 22, 1947 from the United States Political Adviser for Japan, Tokyo, on the subject "Emperor of Japan's Opinion Concerning the Future of the Ryukyu Islands".
(COPY)
GENERAL HEADQUARTERS
SUPRENE COMMANDER FOR THE ALLIED POWERSDiplomatic Section
TOP SECRET --> CONFIDENTIAL
20 September 1947
MEMORANDUM FOR: General MacArthur
Mr. Hidenari Terasaki, an adviser to the Emperor, called by appointment for the purpose of conveying to me the Emperor's ideas concerning the future of Okinawa.
Mr. Terasaki stated that the Emperor hopes that the United States will continue the military occupation of Okinawa and other islands of the Ryukyus. In the Emperor's opinion, such occupation would benefit the United States and also porvide protection for Japan. The Emperor feels that such a move would meet with widespread approval among the Japanese people who fear not only the menace of Russia, but after the Occupation has ended, the growth of rightist and leftist groups which might give rize to an "incident" which Russia could use as a basis for interfering internally in Japan.
The Emperor further feels that United States military occupation of Okinawa (and such other islands as may be required) should be based upon the fiction of a long-term lease -- 25 to 50 years or more -- with sovereignty retaind in Japan. According to the Emperor, this method of occupation would convince the Japanese people that hte United States has no permanent designs on the Ryukyu Islands, and other nations, particulary Soviet Russia and China, would thereby be (e?)stopped from demanding similar rights.
As to procedure, Mr. Terasaki felt that the acquisition of "military base rights" (of Okinawa and other islands in the Ryukyus) should be by bilateral treaty between the United States and Japan rather than from part of the Allied peace treaty with Japan. The latter method, according to Mr. Terasaki, would savor too much of a dictated peace and might in the future endanger the sympathetic understanding of the Japanese people./s/ W. J. Sebald
