2026 Auto Resort Tomakomai Alten Asonde Pond Full-Day Course

Auto Resort Tomakomai Alten, spreading out at the foot of Mt. Tarumae (樽前山), is one of Hokkaido's leading stay-type resorts, with a campground and a hot spring on the same grounds. Within it, Auto Resort Tomakomai Alten Asonde Pond is a free water play area where you can play freely in a shallow pond. Tomakomai City's information lists the open period as year-round, but water play is naturally centered on the summer season. The venue is Auto Resort Tomakomai Alten in Tomakomai City (苫小牧市), and with toilets and parking well provided, it is easy to spend a whole day here even with small children. In the morning, head first to nearby Nishiki Onuma Park (錦大沼公園). It is a nature park holding the marshes Onuma and Konuma, and simply walking through the forest and waterside scenery takes you away from the heat of town. For lunch, eat and rest at Yunomi no Yu, the hot-spring facility inside the Alten grounds. In the afternoon it is finally time for Asonde Pond, playing on the shallow water until evening. Being able to step into the hot spring right after playing and then head home is a finish unique to this place, and a major attraction. With a campground attached, staying the night remains an option too.