While discussions remain ongoing and confidential, an agreement could be finalised within days if negotiations progress successfully.
Shares in Topcon jumped nearly 7% following reports of the potential deal.
Topcon is backed by activist investors ValueAct Capital and Oasis Management, which together hold approximately 25% of the company’s shares.
The potential buyout comes amid a wave of private equity interest in Japan, driven by ongoing corporate governance reforms, growing shareholder activism, and a weaker yen.
This marks KKR’s latest move in the region, following its agreement earlier this week to take FUJI SOFT private in partnership with the company’s founding family.