At Hitachi Seaside Park's Miharashi Hill, the removal of frost protection sheets began on February 10th, 2026. The work is currently about 40% complete and is scheduled to finish on February 26th. The white sheets that protected the Nemophila plants from the cold winter weather during germination and root development are being removed, revealing the growing plants beneath. This transformation marks a sign of spring and builds anticipation for the hill to be covered in a blanket of blue.
The Hill's Landscape Transforms from White to Green

The sheet removal covers approximately 4.2 hectares of Miharashi Hill, requiring about 70 people over approximately 10 working days. The frost protection sheets have high heat and moisture retention properties and also promote growth. Therefore, removal prioritizes areas where the plants have grown larger. The work progresses in stages while observing the Nemophila growth conditions to ensure the entire hill blooms beautifully in spring.
Nemophila
| Details | Information |
|---|---|
| Best viewing period | Mid-April to early May |
| Variety | 1 variety (Insignis Blue) |
| Number of plants | Approximately 5.3 million |
| Location | Miharashi Hill |
| Planting area | Approximately 4.2 hectares |
Small Leaves Signal the Arrival of Spring
As the frost protection sheets are removed and the young Nemophila leaves spread out, Miharashi Hill gradually changes to green. Spring preparations begin in earnest, with workers carefully removing weeds by hand alongside the sheet removal to avoid interfering with Nemophila growth. The plants are still small, but expectations grow for their development and the arrival of spring.


Enjoy "Nemophila Gourmet" Year-Round
The park's cafes offer original menu items available regardless of season, including drinks reminiscent of the Nemophila flower color and refreshing landscape, as well as sweets perfect after a stroll. In the calm winter park atmosphere, enjoy a relaxing time experiencing the charm of Nemophila.



Hitachi Seaside Park Hitachi Park Management Center
Hitachi Seaside Park is located on the Pacific coast of Hitachinaka City, Ibaraki Prefecture. Throughout the four seasons, visitors can enjoy colorful flowers including spring Nemophila, daffodils, and tulips; early summer poppies and roses; summer zinnias and sunflowers; autumn kochia and cosmos; and winter ice tulips. In addition to the amusement park "Pleasure Garden" featuring a large Ferris wheel offering views from 100 meters above sea level and various attractions including a roller coaster, the park offers forest athletic fields, barbecue areas, and more. With diverse activities including dining, sports, and picnicking, there are countless ways to enjoy this attraction-filled park.
Hitachi Seaside Park Hitachi Park Management Center Public Relations Section
605-4 Onuma, Mawatari, Hitachinaka City, Ibaraki Prefecture 312-0012
TEL: 029-265-9001
FAX: 029-265-9339
Official Website: https://www.hitachikaihin.jp/
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