Walk through the management access corridor of Hoheikyo Dam—which is not normally open to the public—and experience the thrilling water release up close!! You’ll be able to watch the release from right next to the release valve. Please take this opportunity to join us.

◎ Date and Time: August 1 (Sat) and 2 (Sun), 2026

◆Advance registration via： email is required.
◆Registration deadline: Must be received by Friday, July 17.
* Same-day registration is not available.

◆Participants must be in 4th grade or higher. Capacity is approximately 180 people. If capacity is exceeded, participants will be selected by lottery.

The event may be canceled in the event of severe weather, such as heavy rain or typhoons, or if there are reports of bear sightings in the area surrounding the dam.

For details and to apply, please visit the Sapporo Development and Construction Department’s FY2026 Event Information page (external link)　→ Click here

Video of the Toyohira Gorge Dam Open House 2022
　→　‘https://www.youtube.com/watch?v=3T5WHOY9dWE