Epcot has publicly announced the new restaurant at the Japan Pavilion:

Quote Originally Posted by Disney Parks & Resorts

... an all-new table service restaurant will be coming to the Japan Pavilion in World Showcase, offering guests a signature dining experience inspired by the natural beauty of Japan. The setting will draw from both nature and takumi, which means “artisan” in Japanese, and the relationship between Japanese craftsmanship and the natural world will be evident throughout the space. This new restaurant will be operated by Mitsukoshi USA, which operates the merchandise, restaurants (Teppan Edo and Tokyo Dining), and kiosks in the Japan Pavilion. Once completed, the restaurant will add to the rich tapestry of authentic cultural experiences available to guests in World Showcase.
The internal announcement of the new location was reported in Tidbits January 2018:

Quote Originally Posted by Tidbits January 2018


Land of the Rising Restaurant

1/21/18 Epcot Cast have reported that a third table service restaurant is in the planning stages at the Japan Pavilion. The site for the third dining spot is to be reclaimed from a backstage and storage area of the Mitsukoshi Department Store. A timetable for this project has yet to be reported.