Sanyo-Onoda (山陽小野田市, San'yō-Onoda-shi) is a city located in Yamaguchi Prefecture, Japan. As of April 2022, the city has an estimated population of 58,978 and a population density of 470 persons per km2. The total area is 132.99 km2. The modern city of San'yō-Onoda was established on March 22, 2005, from the merger of the city of Onoda, with the town of San'yō (from Asa District). San'yō-Onoda is between Ube and Asa, and is largely an industrial town. It has a beach area called Kirara Beach, a manmade beach that has a few restaurants and a glass-making factory. From Wikipedia