"The dates I want are always full." But cancellations happen — Aitayo helps you catch them.
Browse Hakone stays →Daily monitoring
Aitayo checks availability for monitored Hakone properties every day and detects when a previously sold-out room opens up.
Book the opening
When a watched room becomes available, you can head straight to the room's page on Rakuten Travel (Japanese site) to book. Popular rooms fill again fast, so act quickly.
Browse first
Start from our private-onsen or dog-friendly lists, or read the Hakone travel guide.
FAQ
Is Aitayo free?
Yes. Monitoring is free. Reservations are completed on Rakuten Travel.
Where do I book?
On Rakuten Travel (the Japanese site, travel.rakuten.co.jp). You can use your browser's translation to book.
Last updated: 2026-07-17 ・ Reservations are on Rakuten Travel (Japanese site).