Fuji Rock is the biggest music festival in the country, with between 100,000 and 150,000 people attending every year. Held in a stunning ski resort about a 90-minute train ride from Tokyo, it has been running since 1997 and the international crowd has been steadily increasing over the years. Held mostly outdoors (with only one indoor stage) you must be well prepared for rain and shine, as you never know which way it will go. Maintaining its Japanese roots, there are hot springs you can soak in and nature walks, with a bit of a Glastonbury vibe (secret woodland gig anyone?), so go explore!
Note : 2020 Olympics have shifted the festival date, which is usually held in July.