Gunma Dam

0606-Aimata Dam

Despite the small size of the dam, the facilities are quite extensive. Of course, there are many things to see and do. National Route 17 runs along the side of the dam lake, which was also called Mikuni Kaido in the old days, and it is said that Kenshin Uesugi also passed through here. Nearby is Sarugakyo Onsen, which would be a good base for sightseeing and touring the dam. / Gravity Concrete Dam / 67m

0623-Naramata Dam

When that huge dike covers your field of vision, you are already in a world of amazement. How could such a man-made structure exist so deep in the mountains! Incidentally, the Tokuyama Dam was the largest embankment in Japan before it was completed. It is now the second largest, but it is so huge that it doesn't matter anymore. Compared to the Tokuyama Dam, where you cannot go directly under the embankment, the Naramata Dam is a more friendly dam. / Rockfill dam / 158m

0612-Yagisawa Dam

The Yagisawa Dam is an arch-type dam in the Okutone Dam Group, and it boasts of its gigantic size. It is the Yagisawa Dam. It is built in a secluded area of Okutone, and no one is allowed to enter beyond this point. / Arch / 131m

0602-Sudagai Dam

The Sudagai Dam is a power generation dam located at the junction of the Naramata Dam and the Yagisawa Dam. When the dam was completed in the Showa period (1926-1989), it was named Naramata Dam, but the upstream Naramata Dam changed only the letters in consideration of the existing Naramata Dam. But in the end, the Naramata Dam, which was the senior dam, changed its name to the Sudagai Dam because it sounded the same and was confusing. So it is a dam that loves its little brother. / Gravity Concrete / 72m

0605-Fujiwara Dam

Fujiwara Dam is the first high dam in the Okutone Dam complex. Although it has the use of power generation, it is not a stand-alone dam, but a pumped storage power generation dam with the upper dam, Tamahara Dam, and Fujiwara Dam is the lower dam. I saw this figure first from the downstream side, so I came straight to the downstream side. It is nice to be able to get a shot from the downstream side. / Gravity Concrete / 95m

0598-komori dam

The entire embankment is overflowing, and when the river is full of water, it creates a magnificent "sudare discharge" because of the natural overflow. It was lucky for us to see the discharge because there are days when the water volume is low and the dam does not discharge water. As you head upstream of the Tone River from this dam, high dams appear one after another, so it is recommended that you aim further upstream. / Gravity Concrete / 33m

0624-Yamba Dam

Entering Gunma from the Nagano Prefecture side, passing near Kusatsu Onsen, I had originally planned to go directly to the planned Yamba Dam construction site, but I noticed a public relations facility called the Yanbakan and made a hasty stop. The Yamba Dam has always been questioned as to whether it should be built or not, and even today it is a major issue that appears in newspaper articles, even in newspapers in the central part of Japan. / Gravity Concrete / 116m

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