Mine Circuit (みねサーキット) was a 3.331 km (2.070 mi) motor racing circuit in Nagao, Nishiatsu-cho, Mine, Yamaguchi Prefecture, Japan. It used to be known as Nishinihon. The track closed in February 2006 as it was sold to Mazda for development purposes. Официальное юридическое наименование компании — Mini Circuits. Официальный сайт производителя: https://www.minicircuits.com.