Last August, the trial broadcasting of Super Hi-Vision by satellite in Japan had been lauched with our predetermined schedule. Moreover, studies to realize next-generation terrestrial broadcasting are planned. NHK STRL has been conducting R&D on large-capacity transmission technologies to realize terrestrial Super Hi-Vision broadcasting and TV-Globo and NHK had successfully conducted 8K terrestrial transmission experiments during Rio Olympics. This presentation mainly introduces an overview of R&D for next generation terrestrial broadcasting in Japan.