The newest restaurant at Tokyo Disneyland opened on March 25, 2017, in Tomorrowland. Plazma Ray’s Diner is a counter service restaurant that specializes in rice bowls and even offers sweet potato fries (which is uncommon in Japan).
This restaurant is a simple re-theme of the former Plaza Restaurant which closed in January 2017. The restaurant is not 100% complete as they are still working on some of the exterior, which is scheduled to open in summer 2017.
Here are a couple photos from TDRExplorer. You can read a full review of this restaurant here.
For more on Tokyo Disney Resort (also Hong Kong Disneyland and Shanghai Disneyland), make sure to visit TDRExplorer.com.