Miyazawa Lake (near Moominvalley Park, Hanno)

Miyazawa Lake is a reservoir lake in Hanno City that serves primarily as the scenic backdrop for the adjoining Metsä Village and Moominvalley Park rather than as a swimming destination. There's no sand or pebble shoreline and no designated swimming area — the water is a still, dark-green reservoir surface framed by forested hills, and visitors experience it mainly from the lakeside walking paths and viewing decks rather than by entering the water. The lake sits in a sheltered valley setting, largely protected from wind, which keeps its surface calm and ideal for reflection photography, especially in the early morning or during autumn foliage season. The atmosphere is closer to a Nordic-themed leisure destination than a beach: Metsä Village's cafes and restaurants line part of the shore with Nordic-style dining and design shops, and photo spots overlooking the water are popular with day-trippers combining a lake walk with a Moominvalley Park visit next door. Amenities cluster around Metsä Village — cafes, shops, and paid on-site parking — rather than at the water's edge itself, and there are no lifeguard services or beach facilities since swimming isn't part of the lake's intended use. Access from central Tokyo takes about 50km via the Seibu Ikebukuro Line to Hanno Station (40–50 minutes), followed by a shuttle bus to Metsä Village (about 15 minutes). The lake and its walking paths draw the steadiest visitor numbers in spring for fresh greenery and in autumn for foliage color reflected on the water, with cafes and photo spots busiest on weekends and around Moominvalley Park's operating hours.