- Location: Miharashi Hill inside Hitachi Seaside Park, Ibaraki Prefecture, Japan.
- Flower Type: Nemophila menziesii (baby blue eyes), a 2-3 cm wide, light blue flower native to California.
- Peak Bloom: Typically mid-April to early May.
- What to expect: The flowers turn the entire hillside into a “soft blue” landscape.
- Accessibility: Accessible via a ~80-minute train ride from Tokyo to Katsuta Station, plus a bus ride.
The phenomenon is so popular that the park sells unique blue-themed treats, such as “blue ramune soda soft serve” ice cream, during the peak season.