Japan's indoor winter answer to Ultra — for the big-room/mainstage crowd who want Swedish House Mafia, Marshmello and Tiesto under one Tokyo-area roof in mid-January.
Mainstage / Big RoomHouse / Tech HouseCity festival (hotel recommended)Large
📅 When & how long
Typical timing: January 17-18, 2026 (Jan) · ~2 days
💸 What it costs
GA tickets: From $192 · 2-day GA (estimate — verify before buying)
Budget all-in (ticket + travel + stay) depends on where you start — the FestDNA quiz calculates it from your home city.
🌡️ Weather reality
Typical window: Jan — January 17-18, 2026
Hard winter cold (think -10 to -20°C) — this is full snow-gear territory
Hotel with late checkout beats the morning-after scramble
Day bag within venue size limits (most stages cap at ~12"×12")
Comfortable broken-in shoes — you'll do 20k steps a day on concrete
Earplugs (high-fidelity — your ears fund the next 30 years of festivals)
Bag size, hydration-pack and prohibited-item policies for GMO SONIC haven't been verified by us yet — check the official site before you pack. We never guess the rules.
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