Ranzan Valley
Open by month
Open in January. No seasonal closure recorded.
Open in February. No seasonal closure recorded.
Open in March. No seasonal closure recorded.
Open in April. No seasonal closure recorded.
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. Autumn leaves mid-November to early December; Autumn Leaves Festival Nov 28–29, 2026.
Open in December. No seasonal closure recorded.
Checked against the official site on 2026-10-15.

A valley of rock terraces on the clear Tsuki River, ringed by red pines. It reminded a forestry scholar of Kyoto's Arashiyama, which gave the town its name; famous for autumn maples.
Nearby
- Ogawa Washi Paper (Washi Experience Center) ≈ 25 min by car
- Ogose Plum Grove (Ogose Bairin) ≈ 35 min by car
- Musashi Kyuryo National Government Park ≈ 45 min by car
- Yoshimi Hyakuana Caves ≈ 50 min by car
- Kawagoe Warehouse District ≈ 50 min by car
Travel times are rough estimates by car.
- Best time
- November — Autumn leaves mid-November to early December; Autumn Leaves Festival Nov 28–29, 2026
- Getting there
- About 35 min walk (2.7 km) from Musashi-Ranzan Station (Tobu Tojo Line) west exit, or Eagle Bus about 10 min to Kyuyochi-iriguchi
- Good to know
- Typhoon damage has closed part of the path beyond the stepping stones toward the viewpoint; use the detour. No cars inside the valley
- Time needed
- 1 h 30 min
Checked against the official Japanese website on 2026-10-15. Report outdated info