Which Russian port provides Russia with the most rapid access to the Pacific Ocean?

Vladivostok

Explanation:

Vladivostok is a port city located in the Russian Far East. Located 9,302 km from Moscow, it is the most important Russian port of the Pacific Ocean.

Founded in the second part of the 19th century, Vladivostok is the capital and the largest city in the Primorie region. It is located less than 100 km east of the Chinese border and across the Japanese Sea from the main Japanese island of Honshu.