A circle with a radius of 3.14 km drawn in the lap of Takeda Shingen✨
The Kofu Basin is a fan-shaped area located in the center of Yamanashi Prefecture. The course forms an equilateral circle with a radius of 3.14 km in the center of the Kofu Basin.
The northern end of the circle is Kofu Castle, the center of Kai, which was once the residence of Shingen Takeda.
The course circles the flat land peculiar to the fan-shaped area between the Kamanashi River and the Fuefuki River. The course is hot in summer and cold in winter, so it is considered to be quite difficult.