There are few sights in Japan's autumn calendar as surreal as Miharashi Hill in early October. At Hitachi Seaside Park in Hitachinaka, Ibaraki, roughly 33,000 round, fluffy kochia bushes — known in English as summer cypress or burning bush — carpet an entire hillside overlooking the Pacific Ocean. Through the summer they are a fresh lime green; then, over the space of about two weeks, the whole hill ignites into deep crimson, as if someone had turned up the saturation on the landscape. It is one of the most photographed autumn scenes in eastern Japan, and 2026 is shaping up to follow the classic timetable.
The transformation happens in stages, and each stage has its own appeal. In mid-to-late September the kochia are still green and at their roundest and fluffiest — this is the quietest time to visit and the season of the park's evening event. From around September 18, 2026, the park holds its Kochia Light-Up on selected evenings: after sunset, the green hillside is washed in shifting colored lights, turning the bushes into thousands of glowing orbs against the darkening sky. It is a completely different experience from the daytime crowds, and because it happens before the red peak, many overseas visitors never hear about it. Check the park's official calendar for the exact light-up dates and extended opening hours before you go.
From late September into early October the hill enters its gradient phase, when green, pink and red mingle across the slope — arguably the most photogenic stage, because the color varies bush by bush. The full crimson peak usually arrives in the second week of October and lasts roughly until mid-October, after which the red fades to a warm golden brown that has its own quiet beauty toward the end of the month.
What makes the timing especially rewarding is that the kochia season overlaps with the park's cosmos fields. Millions of pink, white and magenta cosmos bloom on and around the same hill through October, so a single climb rewards you with red kochia above and pastel cosmos below, with the sea on the horizon. Sightseeing paths loop up and over Miharashi Hill; the climb is gentle and takes about 15–20 minutes to the summit, where you get the classic panorama of red domes rolling down toward the ocean.
Getting there from Tokyo is straightforward. Take the JR Joban Line limited express (Hitachi or Tokiwa) from Tokyo or Ueno Station to Katsuta Station — about 85 minutes — then a local bus from the station's east exit to the park's gates, roughly 15–20 minutes. During the kochia peak, direct seasonal buses also run from the station and occasionally from Tokyo Station; they save hassle but sell out early on peak weekends. Drivers should note that the parking lots fill before mid-morning on October weekends — arrive at opening time (usually 9:30) or aim for a weekday.
A few practical tips. First, regular adult admission is around 450 yen, but the park applies a higher seasonal rate during peak flower periods, so expect to pay more in October and check the official site for current prices. Second, weekends during the crimson peak are extremely busy; if you can only come on a Saturday or Sunday, arrive at opening and head straight for the hill before tour groups arrive around 11:00. Third, the park is enormous — about 200 hectares of gardens, dunes, forest, a cycling course and the Pleasure Garden amusement area with its seaside Ferris wheel — so renting a bicycle at the gate (a few hundred yen) is the best way to combine the kochia hill with the rest of the grounds. Finally, the sea breeze on the exposed hill is stronger and cooler than in Tokyo; bring a light jacket for morning or evening visits, especially if you stay for the light-up.
You can see the venue's full event lineup, opening details and everything else happening there this season on our page for Hitachi Seaside Park: https://matsurimap.app/en/place/62badcf7-bf9d-443c-94cb-180427e582f2 — worth a look before you go, since the park runs craft workshops, guided nature walks and seasonal food stalls alongside the flowers throughout autumn.
If your October itinerary has one free day for a trip out of Tokyo, this is one of the strongest candidates in the entire Kanto region: a landscape that exists in this form nowhere else in Japan, at its absolute best for only about two weeks a year.
Image: Kochia Hill at Hitachi Seaside Park, CC BY-SA 4.0, via Wikimedia Commons
