History & culture
Komoro Castle Ruins (Kaikoen)
小諸城址懐古園
Kaikoen is a historic park occupying Komoro Castle’s Sengoku-period site, where natural ravines, stone walls, dry moats and baileys survive, with views toward the Chikuma River and Mount Asama.
Plan your visit
- Hours
- 9:00–17:00; museums and winter facilities close at 16:30, last museum entry 16:00
- Closed
- Wednesdays from December to mid-March; 29 December–3 January
- Admission
- Common ticket: Adult ¥500, junior high school and younger ¥200; grounds-and-zoo ticket: adult ¥300, child ¥100
- Address
- 311 Tei, Komoro, Nagano 384-0804
- Phone
- +81-267-22-0296
Good to know: Pets are allowed in Kaikoen but not in the zoo or amusement park.
. Schedules and prices can change, so confirm before making a special trip.
Getting there
About a 3-minute walk from Komoro Station; 169 m straight-line from Komoro Station. Open the walking map for the route from your current location.
Nearby places
- Chōkokan Museum 21 m away
- Komoro Gijuku Memorial Museum 67 m away
- Kusabue Honten 69 m away
Sources
References: C7, C8, english_chinese_pamphlet.pdf:p2, komoro_EN_MAP.pdf:p1, C157
Visitor details were checked against the place operator, municipal or tourism listing, or a current directory on 10 August 2026. Confirm changes directly with the venue.