The Sanyo Electric Railway Main Line is a railway line in Japan operated by the private railway operator Sanyo Electric Railway. It stretches from Kobe west to Himeji via Akashi, Kakogawa and other municipalities in Hyōgo Prefecture. The line runs parallel to West Japan Railway Company JR Kobe Line, with closest sections between Sanyo Suma and Sanyo Akashi stations, and competes with the JR line for its entire stretch. Despite the name, no part of the line is located in the San’yō region.

Himeji is a city located in Hyōgo Prefecture in the Kansai region of Japan. As of 1 June 2022, the city had an estimated population of 525,682 in 227,099 households and a population density of 980 persons per km2. The total area of the city is 534.35 square kilometres (206.31 sq mi).