Aoi Ike in Biei, the blue pond framed by bare trees
Published on 08/13/2026 at 14:17 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWS
Aoi Ike near Biei in northern Japan is a small pond where pale tree trunks stand in still, blue water, giving the landscape an almost otherworldly calm. Set in the Shirogane area of Hokkaido, it began as part of a river control scheme and has since become known for the unusual colour of its surface.
A man-made pond in Hokkaido’s volcanic landscape
Aoi Ike is located in Biei, a town in Hokkaido’s Kamikawa District, in a forested area called Shirogane along the Biei River.Shirogane in Biei The pond is man-made and forms part of an erosion control system that was developed to protect Biei from volcanic mudflows linked to Mount Tokachi, an active volcano in the Tokachi mountain group.erosion control system
Works on the Biei River were carried out after an eruption of Mount Tokachi in 1988, leading to a series of structures that include dams and embankments in the Shirogane area.1988 eruption of Mount Tokachi Aoi Ike formed as part of these works when accumulated water behind one of the structures created a small pond, leaving tree trunks and branches projecting from the surface and giving the site its distinctive profile.small artificial pond
The blue water and standing trees
The name “Aoi Ike” literally means “blue pond” in Japanese, a reference to the colour that visitors see when the water reflects the sky and surrounding forest.meaning of Aoi Ike The surface often appears turquoise or milky blue, while the trunks of trees emerging from the water are pale and weathered, forming vertical lines against the horizontal plane of the pond.
The colour is linked to minerals dissolved in the water, including aluminium compounds carried from upstream springs and cliffs, which combine with river water to create a fine mixture that affects how light is scattered.natural minerals dissolved On clear days, the blue tint stands out against the forested slopes and volcanic landscape of central Hokkaido, and in different seasons the same trees can be seen against water that ranges from vivid blue to muted tones when ice or weather changes the surface appearance.unique blue tint
Paths, viewpoints and nearby landscape
Visitors reach Aoi Ike along a short approach from a parking area, following paths through woodland to viewpoints beside the pond.walk from bus stop The viewing areas lie slightly above the water level, giving clear sightlines across the pond to the standing tree trunks and to forested slopes in the distance.
The wider landscape around Aoi Ike includes the Biei River and the Shirogane area, which is known for hot spring resorts such as Shirogane Onsen and for nearby waterfalls including Shirahige Falls.Shirahige Falls and Shirogane Fields and rolling hills around Biei contrast with the volcanic terrain of Mount Tokachi and its neighbours, and Aoi Ike sits between these agricultural landscapes and the mountains, making it an accessible point where forest, river control works and mineral-rich water meet.
Visiting Aoi Ike: what travellers from Western Europe should know
- Aoi Ike lies in the Shirogane area south-east of central Biei, in Hokkaido’s Kamikawa District; buses from JR Biei Station stop at the Shirogane Aoiike Iriguchi bus stop on the road beside the pond.
- The terrain around the pond consists of compacted paths through woodland and short slopes; expect a brief walk on uneven ground from the parking area or bus stop to the viewing points.
- In winter, snow and ice can cover the paths and pond surface, and illumination is set up along the banks after sunset during a defined season.
- The official language is Japanese and the currency is the 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.
Searching for Aoi Ike on social platforms
These links open searches for Aoi Ike on each platform.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 and along prefectural road 966.
What should visitors expect on a visit?
Visitors can expect a short walk through woodland to viewpoints overlooking blue water with standing tree trunks, set in a volcanic and forested landscape.
What makes Aoi Ike distinctive?
Aoi Ike is distinctive because it is a man-made pond from river control works whose mineral-rich water appears blue and is dotted with pale, dead trees rising above the surface.
