BABYMETAL plays at 6-6:45PM on Sunday, August 4th on the Super Stage (main stage). Full timetable:
A few tickets are still left:
Source: Festival Facebook page
This is essentially a "merch festival", there will be merch stands with merchandise from several artists.
It includes a show report for the last 5 shows, as well as the "top 5 moments" from the "10 BABYMETAL BUDOKAN" shows.