Komoro Castle Ruins (Kaikoen)
Open by month
Open in January. No seasonal closure recorded. New Year (Dec 29 – Jan 3): closed.
Open in February. No seasonal closure recorded.
Open in March. No seasonal closure recorded.
Open in April — at its best. Cherry Blossom Festival in April; Autumn Leaves Festival late October to November.
Open in May. No seasonal closure recorded.
Open in June. No seasonal closure recorded.
Open in July. No seasonal closure recorded.
Open in August. No seasonal closure recorded.
Open in September. No seasonal closure recorded.
Open in October. No seasonal closure recorded.
Open in November — at its best. Cherry Blossom Festival in April; Autumn Leaves Festival late October to November.
Open in December. No seasonal closure recorded. New Year (Dec 29 – Jan 3): closed.
Checked against the official site on 2026-10-15.
Ruins of Komoro Castle, said to be Japan's only 'ana-jiro' castle built lower than its town, turned into a park in 1926. Known for cherry blossoms and autumn leaves, with museums and a small zoo inside.
Important Cultural Properties (Otemon and San-no-mon gates); Japan's Top 100 Castles
Nearby
- Unno-juku ≈ 30 min by car
- Inakura Rice Terraces ≈ 35 min by car
- Tatsuoka Castle Goryokaku ≈ 40 min by car
- Onioshidashi Park ≈ 45 min by car
- Ueda Castle Ruins Park ≈ 45 min by car
Travel times are rough estimates by car.
- Best time
- April, November — Cherry Blossom Festival in April; Autumn Leaves Festival late October to November
- Getting there
- 3 min walk from Komoro Sta. (JR Koumi Line / Shinano Railway)
- Fee
- Combined ticket ¥500 (junior high and under ¥200); grounds-only ticket ¥300 (¥100)
- Good to know
- 9:00–17:00 (museums until 16:30 in winter). Closed Wednesdays from December to mid-March and Dec 29–Jan 3
- Time needed
- 1 h 30 min
Checked against the official Japanese website on 2026-10-15. Report outdated info