Notable lake · Oshima Subprefecture, Hokkaido Prefecture

Junsai Swamp

蓴菜沼

Junsai Swamp is a lake in Oshima Subprefecture, Hokkaido Prefecture.

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Junsai Swamp: crowds and conditions

Typical pattern: moderate; weekends busier. Been there recently? Post today’s status and it shows here for the next traveller.

Status options for this lake: Full / gates open · Low water level · Entry closed.

Best time to visit Junsai Swamp

Season: August to December when reservoirs are full and gates may open.

Busiest days: Weekends and long holidays.

Crowd: Moderate; weekends busier.

Typical week: Mon light · Tue light · Wed light · Thu light · Fri light · Sat busy · Sun busy.

How to reach Junsai Swamp — distance from nearby cities

    Coordinates: 41.98546, 140.63065. Road distances are estimates; the road-trip planner uses real routes and adds stops worth the detour.

    Places to visit near Junsai Swamp

    See everything within a day’s drive of Junsai Swamp

    Other lakes, dams & reservoirs near Junsai Swamp

    All lakes, dams & reservoirs in Hokkaido Prefecture

    Map data © OpenStreetMap contributors (ODbL)

    Frequently asked

    What is the best time to visit Junsai Swamp?

    August to December when reservoirs are full and gates may open. Moderate; weekends busier.

    What are the places to visit near Junsai Swamp?

    Nearby: Onuma Quasi-National Park (sanctuary, 5 km), Mt. Komagatake (viewpoint, 12 km), 鷲ノ木遺跡 (fort, 21 km), 亀田八幡宮 (temple, 29 km), Goryōkaku (fort, 29 km), Ōfune Site (fort, 31 km).

    Is Junsai Swamp worth visiting?

    Junsai Swamp is listed as a notable lake in Hokkaido Prefecture on Spotwander.