Each year, around 40,000 kochia plants of the “Rouge” variety cover roughly 2.3 hectares of Miharashi Hill. These fluffy, round plants—historically used for making brooms—turn from vivid green to crimson red, creating a breathtaking contrast with the blue sky and nearby flower fields.

The color transformation begins in early October, reaches its most vivid hues around October 18–20, and gradually shifts to a warm, burnt-brown tone by late October. The kochia’s dense coverage gives the illusion of a rolling, red carpet across the hill, making it one of Japan’s most iconic autumn views.

Beyond the kochia, the park boasts a colorful variety of autumn blooms, including 2.36 million cosmos and about 530,000 soba (buckwheat) flowers.

These delicate flowers add pastel shades of pink and white to contrast with the red kochia, creating a colorful and diverse autumn display.

The cosmos are in full bloom from mid to late October. Their soft tones provide a beautiful backdrop to the kochia’s deepening reds, enhancing the overall charm of the park’s autumn scenery.

Meanwhile, at the Welcome Garden, visitors can stroll among about 20,000 blooms from 25 flower varieties between mid-August and late October, including marigolds and blue salvia that complement the kochia season beautifully.

Nearby, around 700 Multiflora Mums in two varieties also reach their best viewing period in mid- to late October, adding bursts of yellow, pink, and purple to the Miharashi-no-Sato area.

For visitors coming slightly later, the Hitachi Rose Garden offers another highlight toward the end of the season. Around 1,800 roses representing 120 varieties bloom between late October and early November, providing a graceful finale to the park’s autumn flower display.

For those seeking the perfect autumn photo, Miharashi Hill offers panoramic views of the colorful fields. The combination of kochia and cosmos really create an ideal spot for photography. The meandering paths within the park also provide immersive opportunities to capture the season’s beauty.

Browse the gallery below to see how Hitachi Seaside Park’s autumn landscapes have looked last year. Once this year’s kochia and cosmos reach their peak, we’ll update the photos to show the park in its latest vibrant form.

At Miharashi-no-Sato, visitors can look forward to the gentle contrast of white “Hitachi Aki Soba” blossoms and the vivid red “Takane Ruby” variety. These soba flowers typically bloom from mid- to late October, adding a soft yet striking accent to the park’s autumn scenery.

Adding a touch of elegance to the park’s autumn landscape, Multiflora Mums bloom in shades of yellow, pink, and purple at Miharashi-no-Sato. These compact flowers typically reach their peak from mid- to late October, enriching the view with their cheerful colors.

This area showcases a variety of 15 colorful flower species, including marigolds and blue salvia. Capture stunning photos as you walk the winding paths, creating the illusion of standing amidst the flower fields.

Last year, a new photogenic spot was added to highlight the beauty of the soba fields. Here, you can capture the colorful scene with kochia, cosmos, and soba flowers in the background.

A new monument spelling out “HITACHI” was introduced as a photo spot last year. Take photos here with the kochia plants nearby for a perfect park memory.

During the event, there are many sweets made with local ingredients.

During this period, visitors can enjoy a wide range of local Ibaraki specialties, from hearty meals made with regional ingredients to seasonal sweets. Popular dishes include park favorites like Ham-yaki (grilled ham skewers) and Kochia Curry. For dessert, don’t miss the autumn classic Marukoro Kochia Soft ice cream, the vivid red Kochia Latte, or the Kochia Blend coffee made with beans from the renowned local café Saza Coffee.

Just two hours from Tokyo, Hitachi Seaside Park offers a breathtaking display of autumn color.

Whether you come for the stunning kochia, the delicate cosmos, or the many other autumn blooms, make sure to visit soon before the colors fade!

(This article was updated in October 2025; for the latest details, see the official website below.)