Hitachi Seaside Park Kochia 2026: When to See the Red Hill, Plus Access & Tickets

Every autumn, Miharashi Hill (みはらしの丘) at Hitachi Seaside Park (国営ひたち海浜公園) in Hitachinaka, Ibaraki, turns a deep, glowing red. The hillside is covered in thousands of round kochia bushes (コキア), and the sight is one of the most recognizable images of autumn in Japan.

The catch is timing. Kochia changes color fast, and the true red only lasts about a week to ten days. Come even a week too early or too late, and you'll find a green or golden hill instead. This guide covers exactly when to go for the red (mid-October), plus admission, access, and how to dodge the crowds—everything you need to plan your visit.

If you're planning a wider autumn trip, see our guide to Japan's best autumn foliage spots as well.

When the Kochia Turns Red

The kochia on Miharashi Hill shifts color through the season. According to the park, the bushes are green from mid-August through late September, turn a green-and-red mix in early October, and hit their deep red peak in mid-October.

That red peak holds for roughly a week to ten days. In late October the red fades toward brown, and from late October into early November the hill turns a soft gold. Every stage has its own look, but if you're after that classic photo of a blazing red hill, mid-October is your window.

The red kochia peaks in mid-October. Before you lock in a date, check the color on the park's official bloom-status page.

Peak timing shifts a little from year to year. The park's bloom-status page regularly posts dated photos showing the kochia's current color. Check it before you leave so you know whether the hill has actually turned red.

The counts vary: the park's seasonal guide lists around 33,000 kochia, while the Park Foundation that manages the grounds puts it at around 40,000. Either way, the whole hill lights up at once.

Hours and Admission in 2026

In autumn, Hitachi Seaside Park is open 9:30 a.m. to 5:00 p.m. from September 1 through October 31, and 9:30 a.m. to 4:30 p.m. from November 1.

The park normally closes on Tuesdays. But it stays open every day from October 1 to 31, so during the red kochia peak you don't need to worry about the day of the week. If you're aiming for September or early November instead, watch out for the Tuesday closures.

Admission is normally ¥450 for adults (high school age and up), ¥210 for seniors (65+), and free for junior high students and younger. During the autumn kochia season, a seasonal surcharge bumps that to ¥800 for adults and ¥560 for seniors.

The park says the seasonal rate applies for "about 20 days in October" in a typical year. The exact 2026 dates haven't been announced yet, so if you're visiting in October, budget for the ¥800 adult rate to be safe.

The Kochia Carnival and Evening Events

The park runs an event called the Kochia Carnival ("Kite Mite Sawatte Kochia Carnival"—roughly, "come, look, and touch") timed to the peak. In 2025 it ran from October 1 to 31. The 2026 dates hadn't been announced as of mid-August, but it's typically held in October.

One thing to keep straight: the nighttime kochia illumination is not held during the red peak. It runs in September, while the kochia is still green. In 2025 it took place from September 12 to 23. So no, you won't find a fiery red hill lit up in mid-October.

The daytime "red hill" peaks in mid-October, while the evening illumination runs in September (September 12–23 in 2025). Pick your date around the one you want to see.

The 2026 carnival and evening-event dates should be announced around September through the park's official site and the Park Foundation. Take a look at the latest schedule before you commit to a date.

Cosmos in Bloom Alongside the Kochia

In autumn, cosmos flowers (コスモス) bloom alongside the kochia on Miharashi Hill. The cosmos are at their best from early to late October, around the same time the kochia turns red. At the foot of the hill you'll also find a patch of white buckwheat flowers.

Red kochia above, pink and red cosmos spreading below—it's a combination you only get in these few autumn weeks. Linger over the flower beds at the base before you head up the hill.

Getting There and Parking

By train, it's about 85 minutes from Tokyo Station to Katsuta Station (勝田駅) on the JR Joban Line limited express. From the station's east exit, catch an Ibaraki Kotsu bus at Bus Stop 2; it reaches the park's West Gate in about 15 minutes.

By car, take the Hitachinaka Toll Road off the Kita-Kanto Expressway and exit at Hitachi Seaside Park IC, which is right at the gate.

There are three parking lots—West, South, and Seaside—and the West lot, next to the West Gate, is the closest to the kochia on Miharashi Hill. Parking runs around ¥600 per day for a standard car, but rates can change, so confirm the current price on the official site.

The park is huge, with about 237 hectares open to visitors. The Seaside Train (a one-day pass is ¥600) loops the park and gets you close to Miharashi Hill, which is handy if you'd rather not wear yourself out walking.

How to Avoid the Crowds

On weekends in mid-October, when the kochia is at its reddest, the roads around the park jam up and the lots can fill. If you want to see the hill without the crowds, aim for a weekday or the first hour after opening.

During peak season, an extra direct bus usually runs from Katsuta Station to the West Gate (currently ¥450 one way for adults). The 2026 operating days hadn't been announced yet, though, so check the bus operator (Ibaraki Kotsu) for the latest before you go.

That short red window only comes once a year. Keep an eye on the bloom status, pick your day, and aim for the peak—ideally on a weekday morning.