We sell postcards of the sea of clouds. Use the "UNKAI Post" on the deck to send them worldwide without stamps.
| Period | Wed, May 13, 2026 – Tue, Oct 13 |
|---|---|
| Time | 5/8～5/31 5:00 AM～7:00 AM 6/1～8/31 4:30 AM～8:00 AM 9/1～10/13 5:00 AM～8:00 AM |
| Appropriate age | For all ages |
| Price | Postcard ￥250 |
| Meeting spot | UNKAI Terrace, next to the Summit Lighthouse Deck |
| Hosted in | Japanese, English, Chinese (Simplified), Chinese (Traditional), Korean |
| Notes | The operation details may change depending on the status of UNKAI Terrace. |