The announcement was made in a Facebook post on Sunday and reported by Rebekah Valentine. It revealed the studio's name, as well as a planned launch window of January 2019.
"I started up my own company called 'JP GAMES, Inc.' Right now, we are preparing for a target January 2019 launch. And to everyone who has assisted me until today--I kindly ask for your ongoing support."
Tabata left Square Enix last October, where he operated as COO of Luminous Studio. His most recent work included Final Fantasy XV and the various DLC relating to it. His departure followed the unfortunate cancellation of upcoming DLC content for the game.
We wish you the best of luck, Tabata and look forward to whatever your studio creates.