Taiki is a town located in Watarai District, Mie Prefecture, Japan. As of 1 August 2021, the town had an estimated population of 7,934 in 3903 households and a population density of 34 persons per km². The total area of the town was 233.54 square kilometres (90.17 sq mi).

The Kisei Main Line is a railway line that parallels the coastline of the Kii Peninsula in Japan between Mie Prefecture and Wakayama Prefecture. The name takes the kanji characters from the names of the old provinces of Kii (紀伊) and Ise (伊勢).