Rolisica
The fictional nation in the movie is clearly a substitute for America. Rolisica is an amalgam of both America and Russia (USSR at the time). The capital, New Kirk City, which Mothra attacks, shares an uncanny resemblance to that of New York City, specifically in its Manhattan-like skyline. The people of Rolisica are clearly coded as Americans; some were played by Turkish actors. The neighborhood where Nelson is killed seems to have an Eastern Orthodox ambiance, similar to that of Russia; in the Japanese version, two priests, one clearly Orthodox, comment that the people can only pray that Mothra will not destroy them. The church bells begin ringing immediately following this speech. The Rolisican flag displays a large crescent moon and small star, reflecting the flag of the Islamic Republic as well as the sickle of the Soviet Union. Roliscan military uniforms, seen in briefly when the Roliscan military lends Japan a weapon to defeat Mothra, resemble those of the Soviet military.
The matte scenes that show Rolisican civilians looking at Mothra in the sky were filmed in Los Angeles, California. Toho had done some filming there in early 1961 and the footage added into Mothra.
Read more about this topic: Mothra (film)