On April 3, 1946, Patriarch Alexey I wrote to Bishop Nicholas (Ono) of Japan. On March 14 I wrote about how preferences of political regimes in the twentieth century resulted in support for a particular Orthodox jurisdiction. During World War Two Japanese authorities worked with the Russian Church Abroad. I also wrote on February 5 how the Russian Church Abroad in Harbin refused to participate in the cult of the goddess Amaterasu. So, it would be unfair to reduce the ROCOR a marionette in Japanese hands. American occupation of Japan coincided with the split between the North American Metropolia and the Russian Church Abroad, when the former perceived the latter as a church of collaborators. This perception colored the attitude toward the Orthodox Church in Japan. The ROCOR hierarchs in Harbin in 1941 consecrated Bishop Nicholas. Apparently he followed suit of the Russian hierarchs in China and on March 27, 1946, he and the Consistory of the Japanese Orthodox Church turned to St. Patriarch Alexy I with a petition for reunification with the Mother Church. On April 3, Patriarch Alexy I informed Bishop Nicholas (Ono) about the settlement of this issue. However, the canonical arrangement of the position of the Japanese Orthodox Church was prevented by the intervention in its life of the Headquarters of the Supreme Command of the American Army, which was then carrying out the occupation of Japan. Colonel of the US military Intelligence Boris Pash, the son of Metropolitan Theophilus (Pashkovsky; † 1950), who headed the Metropolitan District of North America, served as an adviser to the commander-in-chief at this headquarters, General D. MacArthur. Boris Pash, on the instructions of Metropolitan Theophile, prevented subjugation of the Japanese Church to the Moscow Patriarchate. Only in 1970, the process of granting autocephaly to the Orthodox Church in America “returned” the Japanese Church to Moscow Patriarchate. Relevant Source: "Church in North Korea," Historical Studies of the Russian Church Abroad.
Source:
Monk Benjamin (Gomarteli), "Letopis' tserkovnykh sobytii nachinaia s 1917 goda," [Timeline of Church Events Beginning from 1917] Part III: 1939-1949. | 
