Visit Oita

Nestled at the foot of Mt. Kurodake on the eastern side of the Kuju Mountain Range, Oike Spring is a natural site of exceptional beauty, known for its crystal-clear, blue-green water that creates a mystical atmosphere. The spring is fed by pure water emerging from underground, its remarkable clarity allowing even the smallest details of the pond’s bottom to be seen from the surface. The spring produces an abundant flow, averaging 14 tons per minute and approximately 20,000 tons per day. This plentiful water supply draws many visitors, particularly on weekends, who come to collect its pristine water. The spring water is naturally filtered over time through the rocks and soil of Mt. Kurodake, a process that enhances its purity. It has been recognized by the Ministry of the Environment as one of the "Top 100 Famous Springs of Japan."
A 1.4-kilometer walking trail starts at Oike Spring, offering opportunities for trekking and immersing yourself in the forest. Along the trail, visitors can admire towering trees over 300 years old and observe a variety of bird species, enjoying a serene connection with nature. Following the trail further leads to the Meisui Waterfall, a refreshing spot where the cool spray invigorates visitors.