Koshi Inaba is a Japanese vocalist, multi-instrumentalist and songwriter. He is best known as the singer and lyricist of the rock duo B'z, the best-selling music act in their native Japan. He has also had a successful solo career, with five studio albums and five singles topping the Japanese music charts. He collaborated with Slash on single "Sahara" which was released in 2009. In 2017, he released a collaborative album, Chubby Groove, with Stevie Salas under the name "Inaba/Salas".

Tsuyama is a city in Okayama Prefecture, Japan. As of 1 February 2023, the city had an estimated population of 97,507 in 45653 households and a population density of 190 persons per km2. The total area of the city is 506.33 square kilometres (195.50 sq mi).