These live cameras show Miwa Dam and several locations along the Mibu River in Katsuma, Takato-machi, Ina City, Nagano Prefecture. Views include Miwa Dam, the lakeside park, Takato Dam, Iijima Weir, the diversion weir, and the sediment bypass outlet.
Miwa Dam is a multipurpose gravity concrete dam on the Mibu River in the Tenryu River system. It supports flood control, irrigation, and hydroelectric power generation. The cameras are useful for checking weather, the lake surface, river conditions, and the surrounding area during heavy rain, typhoons, or snowmelt.
- View the Miwa Dam Live Cameras
- Live Camera Information
- What You Can Check with the Miwa Dam Cameras
- Checking Water Level, Rainfall, and Discharge
- Current Conditions at Miwa Dam and the Mibu River
- Weather around Takato and Miwa Lake
- Weather Forecast for Ina, Nagano
- Rain Radar around Ina
- Map of Miwa Dam – Google Maps
- Frequently Asked Questions
- Related Live Cameras around Miwa Dam
- Nearby Live Cameras
View the Miwa Dam Live Cameras
The images are updated at regular intervals. Use the links below to check the latest conditions around Miwa Dam and the Mibu River basin.
- Camera 1 – Miwa Dam
- Camera 2 – Diversion Weir
- Camera 3 – Iijima Weir
- Camera 4 – Dam Lakeside Park
- Camera 5 – Sediment Bypass Outlet
Live Camera Information
- Stream type: Still images
- Update interval: Approximately every 10 minutes
- Operator: Tenryu River Dam Integrated Management Office
- Official camera page: Miwa Dam Live Cameras
- Location: 1673 Katsuma, Takato-machi, Ina City, Nagano Prefecture 396-0214, Japan
What You Can Check with the Miwa Dam Cameras
The cameras cover Miwa Dam, Miwa Lake, the lakeside park, Takato Dam, Iijima Weir, the diversion weir, and the sediment bypass outlet. Multiple viewpoints make it easier to understand water movement and weather across a wider part of the Mibu River basin.
In clear weather, the images show Miwa Lake and the surrounding mountains. During rain or an approaching typhoon, they can help you observe rising water, turbidity, and general conditions related to discharge operations. These are periodically updated still images rather than continuous video.
Checking Water Level, Rainfall, and Discharge
For an accurate understanding of conditions around Miwa Dam, use official water-level, rainfall, and discharge data together with the camera images. During heavy rain, the volume of water in the reservoir, the Mibu River flow, and downstream conditions can change rapidly.
During a typhoon, a stationary rain band, prolonged rain, or spring snowmelt, never rely on the visible camera area alone. Check forecasts, rain radar, and disaster information from the Japan Meteorological Agency, local government, and the Ministry of Land, Infrastructure, Transport and Tourism. Miwa Dam also contributes to flood control for the Mibu River and the main Tenryu River.
Current Conditions at Miwa Dam and the Mibu River
Miwa Dam is a multipurpose facility on the Mibu River, which flows from the Southern Alps toward the Ina Valley. River level and flow can change significantly when rainfall increases.
The cameras help you check the sky, lake surface, and river area before traveling toward Takato. Comparing them with other Mibu River cameras can provide a broader view from upstream to downstream.
Weather around Takato and Miwa Lake
Miwa Dam lies in a mountain area of Takato, and local weather or perceived temperature may differ from central Ina. Before sightseeing, driving, visiting Takato during the cherry blossom season, or traveling toward the Southern Alps, check the sky and wet road conditions.
The cameras are useful for spring congestion and weather, summer showers and thunderstorms, autumn foliage conditions, and winter snow or ice. Combine the images with the forecast and rain radar before departure.
Weather Forecast for Ina, Nagano
Rain Radar around Ina
Map of Miwa Dam – Google Maps
Frequently Asked Questions
What can I see on the Miwa Dam live cameras?
You can check Miwa Dam, Miwa Lake, the lakeside park, Takato Dam, Iijima Weir, the diversion weir, and the sediment bypass outlet at several locations along the Mibu River.
Can I check the water level and discharge?
The cameras show visible conditions around the dam, but exact water level, rainfall, and discharge values should be checked through official observation and disaster-information services.
Are the cameras useful for checking local weather?
Yes. They show the sky, lake surface, rain, and visibility around Miwa Dam and are useful before sightseeing or driving in Takato.
Related Live Cameras around Miwa Dam
For a broader picture during heavy rain, compare several cameras along the Mibu River and nearby tributaries. Do not approach dangerous locations during flooding or severe weather.
- Takato Dam Live Camera
- Mibu River at Haibara River Park Live Camera
- Mibu River at Ichinose Live Camera
- Mibu River at Sugishima Live Camera
- Mibu River at Irokuzawa No. 3 Live Camera
- Todai River at Todai Live Camera
- Okachidani River Live Camera
- Takato Castle Ruins Park Live Camera
- Koshibu Dam Panoramic Live Camera
Browse more cameras in Ina City and throughout Nagano Prefecture.