Sysmex Corporation (シスメックス株式会社, Shisumekkusu Kabushiki-gaisha) is a Japanese company headquartered in Kobe that is engaged in the health care business.

The company was renamed Sysmex Corporation in 1998 taking advantage of brand recognition of their machines.

Along with its subsidiaries, Sysmex is involved in the development, manufacture and sale of laboratory testing reagents and laboratory equipment; the development and sale of computer systems for medical institutions, as well as the development and sale of software used for clinical examination information systems.

It has offices and factories throughout Asia, as well as branches in Europe, Canada, United States, Australia and New Zealand.

On April 1, 2011, Katakura Industries Co., Ltd. sold its biological science research department to the company.