Lake Toyoni (Heart Lake)
Open by month
Partly closed in January: some days or parts are closed — see the official site.
Partly closed in February: some days or parts are closed — see the official site.
Partly closed in March: some days or parts are closed — see the official site.
Open in April. No seasonal closure recorded.
Open in May. No seasonal closure recorded.
Open in June. No seasonal closure recorded.
Open in July. No seasonal closure recorded.
Open in August. No seasonal closure recorded.
Open in September. No seasonal closure recorded.
Open in October. No seasonal closure recorded.
Open in November. No seasonal closure recorded.
Partly closed in December: some days or parts are closed — see the official site.
Checked against the official site on 2026-10-15.

A small lake about 1 km around and 18 m deep, ringed by old-growth forest. Seen from the air it is heart-shaped, hence the nickname 'Heart Lake', and northern pikas live in the woods around it.
Hidaka-sanmyaku Erimo-Tokachi National Park
Nearby
- Cape Erimo ≈ 45 min by car
Travel times are rough estimates by car.
- Getting there
- By car only, from National Route 336 at Meguro, Erimo, along a gravel forest road by the Saruru River (about 2 h from Tokachi-Obihiro Airport); 200 m walk from the car park to the shore
Easier with a tour or car - Fee
- Free parking
- Good to know
- The road is not cleared of snow in winter, so cars cannot get through. Large buses and low cars will struggle on the gravel road. The car-park toilet closed on Nov 30, 2024. The heart shape cannot be seen from the ground
- Time needed
- 45 min
Checked against the official Japanese website on 2026-10-15. Report outdated info