Blocking the Miyako Strait is not a difficult task for East Africa. The East African expeditionary fleet can achieve this. At that time, the Miyako Strait was not a very busy route, so every day, Japanese ships attempting to pass through the strait faced troubles. Thus, in the daily patrols of the East African navy, many managed to slip through, but those caught could only pay a hefty tax to East Africa; otherwise, their ships would be seized.
Under the protection and escort of the East African navy, the previously almost halted construction of the Southern Ryukyu Islands saw significant changes, especially on the northernmost Miyako Island. After resuming shipping with parts of the Far East continent, East Africa began expanding and repairing the island's ports.
