Vazquez (33-3, 13 knockouts), THE RING's No. 1-rated lightweight, came in 134.8 pounds — the same as Russian opponent Denis Shafikov (33-0-1, 18 KOs).
Vazquez, 27, is attempting to make the sixth defense of his belt against Shafikov, a 28-year-old who is coming off a seventh-round stoppage victory over Santos Banavides in August that marked his debut in the United States.
Shiming (3-0) weighed 111.8 pounds compared to 110.6 for flyweight rival Yokthong Kokietgym (15-3, 11 KOs) of Thailand.
Murata weighed 161.4 pounds to 160.6 for will face Brazilian Carlos Nascimento, and Mekhontsev, 177.2 compared to 173.6 for Thai fighter Jaritram Atthaporn.
For a featherweight battle of ex-beltholders, Japan's Akifumi Shimoda 125.8 to 125.6 for Marvin Sonsona of the Philippines, while Hong Kong junior bantamweight Rex Tso was 114.6 to 114.4 for Japan's Mako Matuyama.