TMI Associates has advised Japanese optic technology company Olympus on the $3.1 billion sale of its industrial microscope subsidiary EVIDENT to U.S. private equity company Bain Capital, which was represented by Nishimura & Asahi.

This is Olympus’ biggest divestment yet, Reuters reported. The sale of the unit, which also makes industrial endoscopes and x-ray analysers, comes as Olympus speeds up the overhaul of its business portfolio to focus solely on medical technology, Reuters added.

The TMI team was led by partner Takushi Saito, while the Nishimura team was led by partners Yuki Oi, Kohei Ishida, Takeshi Nemoto, and Junko Wakabayashi.

Also advising Olympus on different legs of the deal were India’s Khaitan & Co and Canada’s Torys. The Khaitan team was led by partner Zakir Merchant with assistance from partners Anshul Prakash and Nishad Nadkarni, while the Torys team was led by partners Don Bell, Guillaume Lavoie, Michael Fortier, Molly Reynolds, and Omar Wakil.