My wife and I went to Tsuruga, splendid Japanese style hotel and hot-springs, by Lake Akan, east part of Hokkaido, with coworkers. The total number of people who went there is ten, including a new born baby of my coworker! We took bathes, ate and drank until midnight. I had a lot of fun and charged a lot of energy. Tsuruga has a variety of hot springs in the highest and lowest floor of the building. Moreover, it is famous for dishes offered in smorgasbord style. We enjoyed both! Anyway, Tsuruga is highly recommended!