Located in Naruko Onsenkyo, Osaki City, Miyagi Prefecture Japan, Katanuma is a caldera lake that boasts one of the highest acidity in the world.Since hot spring gas and water vapor are generated from the bottom of the lake, it does not freeze even in winter even though it is in the mountains of the Tohoku region, and because it is strongly acidic, no fish inhabit it.
It is located near Naruko Onsenkyo, which has a characteristic of seven colors of hot water, and you can also enjoy the beautiful scenery of Katanuma, which changes to various colors such as emerald and blue.
Although it is hardly known as a place to observe the starry sky in Miyagi prefecture, you can observe the beautiful starry sky that is less affected by light pollution such as street lights.The day of shooting was the maximum day of the Aquarius delta meteor shower, but I could hardly see it all night long.

Time Lapse video Aquarius delta meteor shower in Katanuma, Miyagi Japan