A skating rink that forms when a forest pond freezes
Kera-Ike is a skating rink formed when a forest pond freezes, next to the Karuizawa Wild Bird Forest, where many wild animals live. When the leaves turn, an artificial-ice area opens first, and in a normal year the natural-ice area freezes in late December and the whole pond becomes the rink.
The page calls its natural ice a rarity that only Karuizawa's very cold winters make possible, and reported the natural-ice area fully frozen on 7 January 2026. A neighbouring café sells forest-themed hot drinks for a limited season, and the Picchio centre in front of the pond runs nature tours to meet the forest's creatures.
This year the rink marks ten years since it opened, with free skating and special offers for Nagano residents from 30 October to 20 November.
Before you head out.
Admission, rentals and arrival details, researched from official rink information. Source checks stay current for 30 days.
Admission
Skating costs ¥1,900 for adults (junior high school and over) and ¥1,300 for children up to elementary school, with hire skates included; during the special-price periods adults pay ¥2,400 and children ¥1,800.
Hire skates are figure skates from 15 to 31 cm, with double-blade skates for 15 and 16 cm. Helmets and sled chairs are lent free, and gloves (¥400) and knitted hats (¥500) are on sale.
There is no age or height limit. Children whose skate size is under 15 cm may enter only on a special bear chair that a skating parent pushes, at the child's fee.