亚瑟士（アシックス；ASICS；东证1部：7936）是一家田径运动用品生产商，公司创办于1949年，当时31岁的创办人鬼冢喜八郎（Kihachiro Onitsuka）开始在日本神户市自己的家里制作运动鞋。当时公司的名称是Onitsuka，再加上「日行千里路、行动最敏捷、亚洲最强的百兽之王——Tiger」成为「Onitsuka Tiger」的品牌。到了1977年与GTO及Jelenk两家公司合并成为亚瑟士。

亚瑟士的英文ASICS是拉丁语名言「Anima Sana in Corpore Sano」中每个单词的第一个字母所组成的，意思是「健全的精神寓于健全的体魄。」

ASICS(アシックス,Ashikkusu) is a Japanese multinational corporation athletic equipment company which produces footwear and sports equipment designed for a wide range of sports, generally in the upper price range. The name is an acronym for the Latin phrase anima sana in corpore sano which translates as "a healthy soul in a healthy body". In recent years their running shoes have often been ranked among the top performance footwear in the market.