Aso crater is under eruption alert level 2 with a 1km restricted zone around the crater—you cannot enter the crater rim itself. However, the mountain summit plaza (山上広場) and park road are open to visitors during posted hours (currently 8:30 AM-5:30 PM through November), with shuttle bus access available.
- Restricted radius: 1,000 m
- Crater shuttle bus: Operating
- Areas affected: Nakadake first crater (中岳火口), crater rim area, mountain summit plaza area
Traffic/Parking (schedule estimate, not live sensor data): Today is a weekend, but outside the typical late-morning/early-afternoon peak, so the effect is usually milder.
If it looks busy: The shuttle bus uses the same road as cars into Kusasenri, so when that lot is full, buses queue in the same backup -- it saves you the parking search, not the traffic itself. If you're driving and not stopping at Kusasenri, the Minamiaso approach (via Nakamatsu) reaches the summit terminal directly without going through Kusasenri at all, which can avoid that bottleneck entirely -- though we don't have confirmed reports on how busy that road itself gets at peak times, so treat it as a "probably better, not guaranteed" option. Arriving before 9:00 or after 15:00 remains the most reliable way to avoid the worst of it regardless of route. Aso City publishes specific congestion forecasts ahead of major holiday weekends (Golden Week, Obon) on its website, worth checking the day before if you're coming on one. If Kusasenri's lot is full, Daikanbo and Komezuka are nearby viewpoints with their own separate parking.
Official Aso regulation status ↗
· updated 3 hours ago
