Aoi Ike in Biei, a blue pond of trunks and reflections
Published on 08/24/2026 at 20:09 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWS
Aoi Ike near Biei in northern Japan is a small man-made pond where pale tree trunks rise from vividly coloured water, creating a still, otherworldly scene in the forest. Set in the Shirogane area of Biei Town in Hokkaido’s Kamikawa District, it forms part of an erosion control system along the Biei River and has become known for the strong blue tones that reflect between water and sky.Blue Pond in Biei
Birch trunks standing in blue water
The defining image of Aoi Ike is the contrast between pale tree trunks and saturated blue water, a view framed by forest on all sides. The pond lies beside the Biei River in a cleared basin where the water surface is scattered with the trunks and branches of trees that once grew on drier ground, their roots now submerged below the surface.the blue pond framed by bare trees Visitors walk along a simple path above the bank and look out across the pond, where the still water mirrors the trunks, the sky and the surrounding forest in calm reflections.
The colour of the water is a strong blue that can shift in shade with light and season, giving the scene different tones through the year.Blue Pond, Shirogane, Biei The surface often appears turquoise, with bands of lighter and darker blue around the trunks and near the shore. The surrounding forest and nearby hills of central Hokkaido form a backdrop, so the trees at the pond sit between water and woodland rather than in an open plain.
A pond shaped by Hokkaido’s volcanic landscape
Aoi Ike is not a natural lake but a pond formed in connection with an erosion control system designed to protect Biei from volcanic mudflows linked to Mount Tokachi, an active volcano in the Tokachi group.erosion control system to prevent damage to Biei The basin sits in the Shirogane area south-east of central Biei, along prefectural road 966 where the river has been shaped and managed. The pond that travellers see is one part of this system, gathering water in a quiet stretch away from the main river channel, with the dam structures themselves largely screened by trees and low banks.
The blue colour is associated with naturally occurring minerals in the water, including aluminium compounds, which interact with light and give the surface its distinctive tone.minerals including aluminium hydroxide This sets Aoi Ike apart from many forest ponds in Hokkaido, where darker greens and browns are more common. The presence of nearby hot spring waters at Shirogane Onsen and the flow of the Biei River give the area a wider landscape shaped by volcanic activity, river erosion and geothermal features, all within central Hokkaido.
Seasonal moods around the blue pond
Aoi Ike changes character with Hokkaido’s marked seasons, while keeping the same basic composition of trunks, water and surrounding forest. In warmer months the banks are free of snow and the trees around the pond carry foliage, so the blue surface sits under green slopes and a relatively mild sky. In winter the pond and its banks lie under snow, the surrounding forest turns monochrome, and the view can include ice at the edge of the water as well as illumination that highlights the trunks and the blue tones after dark.Blue Pond Hokkaido in winter
The approach to the pond is laid out as a short walk through forest from a roadside parking area, with paths that lead visitors along the bank and between trees. From these paths several viewpoints face across the pond, so the trunks can be seen against different parts of the water surface and the hills beyond. The atmosphere is shaped by the quiet of the forest, the stillness of the pond and the orderly rows or clusters of pale tree trunks standing amidst the blue.
Visiting Aoi Ike: what travellers from Western Europe should know
- Aoi Ike lies in the Shirogane area of Biei Town in Hokkaido’s Kamikawa District, beside the Biei River along prefectural road 966 between central Biei and the onsen settlement of Shirogane.Shirogane Blue Pond information
- The nearest railway hub is JR Biei Station; buses run along the road to a stop named Shirogane Aoiike Iriguchi beside the pond, and there is an access path from the roadside towards the viewing area.Blue Pond travel details
- The viewing area is reached on foot along forest paths from the parking area and roadside, with gentle gradients but uneven ground and trees close to the path in places.
- The surrounding region is central Hokkaido; the official language is Japanese and the currency is the Japanese yen.
- Entry requirements depend on your nationality; UK travellers can check the FCDO travel advice at gov.uk/foreign-travel-advice, Irish travellers the Department of Foreign Affairs at ireland.ie.
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Frequently asked questions about Aoi Ike
Where is Aoi Ike located?
Aoi Ike is in the Shirogane area of Biei Town in Hokkaido’s Kamikawa District, beside the Biei River along prefectural road 966, south-east of central Biei.
What should visitors expect at the pond?
Visitors walk along forest paths to viewpoints over a small pond marked by pale tree trunks standing in vivid blue water, with reflections of sky and woodland.
What makes Aoi Ike distinctive among Hokkaido’s landscapes?
The combination of man-made pond, mineral-rich blue water and standing trunks in a forested volcanic landscape gives Aoi Ike a recognisable, quietly surreal appearance.
