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　The twilight created by the setting sun is the color magic created by the sun and atmosphere of once-in-a-lifetime encounter, where nothing is the same.　　　"Twilight time" refers to the whole twilight time, and "Magic hour" refers to "Golden hour" wrapped in bright dazzling light, fantastic blue-purple gradation "Blue hour" is a beautiful scene that is also called even a name that emphasizes the color tone.　　　　　　　　　　　　　　　　　　　　　　　Sunlight (visible light) spectroscopy into seven colors with different wavelengths of red, orange, yellow, green, blue, indigo, and purple through the prism, and it is scattered by dust and water vapor before it reaches our eyes after passing through the atmosphere layer. Morning and evening "burning" is a phenomenon that occurs when sunlight is lower than during the day and passes through the atmosphere for a long time from the horizon, and the red line light with long wavelengths reaches the eyes mainly. It changes depending on the amount of water vapor in the air, etc., and the position of the sun and the movement of clouds show an ever-changing appearance.　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　The unique twilight art that unfolds all over the sky on the right bank of the lower right bank of the Sumida River, seen from Chuo-ohashi Bridge, is a mysterious moment of moment.