Mikata Five Lakes Rainbow Line

The Mikata Five Lakes are a cluster of five interconnected lakes located in Wakasa Bay along the Sea of Japan coast in Fukui Prefecture. These lakes—Mikata, Suigetsu, Suga, Kugushi, and Hiruga—are renowned for their unique natural phenomenon where each lake displays a different color due to varying levels of salinity, depth, and aquatic vegetation. This distinctive characteristic has earned them recognition as one of Japan's most picturesque lakeside destinations.

The Rainbow Line refers to the 11.24-kilometer toll road that winds through the mountains above the lakes, connecting Obama City to Mihama Town. Originally constructed in 1964 as a scenic drive route, the road reaches elevations that provide sweeping views of the five lakes below, the rugged coastline of Wakasa Bay, and on clear days, the distant peaks of the Japanese Alps. The observation points along this route showcase the contrasting colors of the lakes, which can range from deep blue to emerald green depending on the season and viewing angle.

At the summit, visitors can access multiple observation decks including the Sanchō Park, which features several themed terraces such as the rose terrace and wood deck terrace. A chairlift and cable car system transport visitors from the parking area to these elevated viewpoints. The park also contains cafes and souvenir shops where regional specialties from Fukui Prefecture are available. The viewing experience is particularly striking during spring cherry blossom season and autumn foliage periods when the surrounding forests add additional layers of color to the landscape.

Access to the Rainbow Line is most convenient by car, with the entrance located approximately 15 minutes by taxi from Obama Station on the JR Obama Line, or about 30 minutes from Mihama Station. Bus services operate but with limited frequency, making private transportation preferable. The toll for passenger vehicles is 1,040 yen, with additional fees for the cable car and chairlift to reach the summit observation areas. Parking facilities are available at both the entrance and summit areas. The lakes themselves can be explored by rental bicycle or on foot, with cycling paths connecting several lakeside points of interest.