Aisin Seiki Co., Ltd. (アイシン精機株式会社 Aishin Seiki Kabushiki Kaisha), also known as Aisin, is a Japanese corporation that develops and produces components and systems for the automotive industry. Aisin is a Fortune Global 500 company, ranked 329 on the 2018 rankings. Aisin is 30% owned by the Toyota Group of companies.