I brought my family of four there on a day trip to experience some fun winter activities and further explore this kid-friendly destination.
However right outside the station is the Karuizawa Prince Shopping Plaza, which I feel has even better facilities, so it might be worth heading there instead.
Karuizawa Prince Hotel Ski ResortThe Karuizawa Prince Hotel Ski Resort is a popular place for skiers and snowboarders both for it's quick access from Tokyo, and it's extra long season due to the use of snow machines to guarantee snow no matter the weather.
This snow resort also offers some great activities for kids of all different ages, including skiing lessons for children as young as 3 years old, and a kid's snow park, which was today's morning activity.
The Prince Shopping Plaza at nightPlenty of changing tables and private booths to choose fromWinter illuminations reflected in the small lake