Find the current time in Japan and the time of sunrise and sunset at Lake Nojiri on this page. http://time.is/Shinano_Machi.
Japan Meteorological Agency's Warnings and Advisories
Rain and Cloud Radar
If a typhoon is coming, you can check out Asahi Shimbun's Typhoon Information.
If you felt an earthquake, you can find information at www.jma.go.jp/en/quake/.
Here is a weather link that shows the amount of accumulation throughout the day.
The 日本道路交通情報センター：JARTIC website helps you find out about road conditions. It's in Japanese. (HINT: Click the map, then mouse-over the areas you are interested in.)