Toyota junior driver Ryo Hirakawa will contest the 2016 Le Mans 24 Hours, along with a full ELMS schedule, with Thiriet by TDS Racing.
Hirakawa, 21, joins the previously-announced pairing of Pierre Thiriet and Mathias Beche in the ORECA 05 Nissan.
Having won the Japanese F3 title in 2012, Hirakawa joined Toyota's Super Formula roster for 2013-2015 and also contested the Super GT schedule for Lexus last year, winning two races with Andrea Caldarelli.
He will continue in Super GT for 2016 as well, racing alongside James Rossiter - and there is a clash between the Japanese championship's Suzuka 1000km round and ELMS' 4 Hours of Le Castellet.
Thiriet by TDS won the 2012 European Le Mans title and finished runner-up on twice more in the subsequent seasons.
The team was second in the LMP2 class in Le Mans 24 Hours in 2012 and 2014, but its car did not finish last year's race, struck by a GT competitor.