Kawaguchi dam Natural energy Museum

Must See!

Touch and study the exhibition of futuristic objects like digital arts, robots and more!
Communication Robot / Exhibition location:Environment study room

sotaYou can enjoy conversation with two communication robot, Ene-sota and Mu-sota. Try to ask whatever in your mind about the natural energy and the sightseeing information of Naka town. You might be able to watch them dancing Awa Odori.

4K display / Exhibition location:Environment study room

4k65You can watch an introduction video of Kawaguchi dam and its hydroelectric plant as well as a beautiful 4K movie of the Naka river and the surrounding forests shot from a drone in cooperation with Naka town. Enjoy an overwhelming visual experience with the latest technology.

Hydrogen Car / Exhibition location:Environment study room

hydrogen_carLet’s play with miniature hydrogen cars. The miniature cars with fuel cell drive on hydrogen split from water through electrolysis at hydrogen filling stations.

Hydrogen Production Experimental Device / Exhibition location:Environment study room

hydrogenSplit from water and turning back into water, hydrogen is an ultimate clean energy.
There is a hydrogen station at Tokushima prefectural office and there are some hydrogen cars driving around in Tokushima.
Hydrogen production experimental device shows how the solar energy produces hydrogen right in front of you.

Experimental Tools (water, wind and solar energy) / Exhibition location:Environment study room

power_generationYou can use different experimental tools to learn how each natural energy system works. For example, fan the mill to get the music to play.
The museum staff will explain how to use the tools. Please feel free to ask about the tool before you use them.

Panel Exhibition / Exhibition location:Environment study room

guidepaneru Panel exhibition explains the mechanism of water, wind and solar energy generation systems. Check them out if you like to learn more about power generation.

Work sheets / Exhibition location:Environment study room

workseetWe have work sheets for elementary school students, which follow the government course guidelines. There are two types of work sheets, one for the younger class students and the other for the older class students.

Sketch Smart Town / Exhibition location:Visual exhibition room

お絵かきスマートタウンThe wall of the visual exhibition room displays the future smart town made up of pictures drawn by visitors.
Draw pictures freely on pieces of paper. Then you will find your pictures popping up on the wall, creating a huge town just in front of you.
There are various kinds of natural energy installed in this smart town such as hydroelectric, solar, wind and biomass energy.
You can change the weather of the town by touching the wall. You will see each energy plant generating electricity to light up the highway across the town.
If you touch the frogs dancing Awa Odori…

Digital Signage / Exhibition location:Entrance & lobby exhibition

32型デジタルサイネージYou can watch the movie showing the inside of Kawaguchi dam. As there are also pictures of under-construction Kawaguchi dam, you can feel as if you were back in 1960.

Indigo Dyed Cedar Light Box / Exhibition location:Entrance & lobby exhibition

aizome_lightbox Along the corridor from the entrance to the environment study room are equipped with light boxes made of indigo-dyed cedar board. Enjoy looking at Tokushima’s indigo dyed product.

Micro Hydroelectric Digital Display Board / Exhibition location:Outdoor exhibition


There is a micro hydroelectric facility on the way to the museum from the the parking lot. You can look at water flowing through the turbine. The amount of electricity generated by the facility is shown on the digital display board.

Water Turbine Runner / Exhibition location:Outdoor exhibition

waterwheel_runnerOn display are two turbine runners used for the water power generation at Kawaguchi dam. You can touch and imagine how powerful the water flow is.

Solar Power Digital Display Board / Exhibition location:Outdoor exhibition

guidePaneruPVThere is a solar panel facility on the roof of the repair factory across the road from the museum. Check how much electricity is generated depending on the weather.

Micro Windmill Electric System / Exhibition location:Outdoor exhibition

small_wind_power_generationIn front of the museum are a savonius windmill and a propeller windmill. The both of them are hybrids with solar panels and revolve smoothly.

Hand Generated Information Board / Exhibition location:Outdoor exhibition

guidePaneru_damTurn the hand generator crank if you want to hear the audio guidance of the museum and Kawaguchi dam.

Indigo Dyed Cedar / Exhibition location:Outdoor exhibition

siboriAttached to the outside wall of the museum are two large pieces of Japanese cedar board dyed with Japan Blue, Awa Indigo. The traditional wood shaving technique called “Naguri” has created the waving surface with subtle shading. The color shade will change with changing reflections of light.

Kawaguchi Dam

About Kawaguchi DamNaka river (main flow channel: 125km, contributory area 880sqr. meter), where the Kawaguchi Dam resides, is the second major river in Tokushima. Sakashu Power Plant (Ottachi Dam), Hinotani Power Plant (Nagayasuguchi Dam), and Kawaguchi Dam had been built, since the integrated river development has been implemented for flood control and water utilization. When Hinotani Power Plant hits the peak of power generation, the amount of water which is used for generating power, depending on how much power generated, fluctuates. Therefore, Kawaguchi Dam has been built as a regulating reservoir to alleviate the flow fluctuation at the lower reach. The effective capacity of the reservoir is 950,000 cubic meter and the water level gets adjusted in between EL93.50meter and 95.00meter.

Mechanism of water-power generation
Water-power generation generates electric power by the force of water which is dropped from height, hitting and turning the water turbine directly connected to the generator. The good thing about water-power generation is since it uses the natural force of water falling and not using fuel, it doesn’t produce any CO2 or much waste.

Kawaguchi Power Plant Kawaguchi Dam produces power by using water, which comes from adjusting the flow fluctuation to be less at its lowest reach when the rain could cause inundation. It produces 11,700 kilo watts of power per second from the maximum of every 70 tons of water used. Kaplan turbine (its blades are adjustable) is used for this dam to correspond with the changes of the lowest reach and the flow fluctuation.