Yaizu is a city located in the central region of Shizuoka Prefecture, Japan. It covers a total area of 70.31 square kilometres (27.15 sq mi) and maintains a population density of approximately 1,905 persons per km2.
As of January 31, 2026, the city had an estimated population of 133,916 residents living in 61,125 households. Yaizu is primarily recognized as a notable port for commercial fishing operations.