Perfume's event "Perfume FES!! 2017" will be held in June at Makuhari Messe. 

This year marks the group's 4th time sponsoring "Perfume FES!!" This time, it will be a 2-day event with an "eve event" on June 2 and the "main event" on June 3. More details on the performing artists and tickets will be revealed at a later date. 

Source: natalie