Nanao Hills (Highest Point 173m), Hachioji and Hino Cities, Tokyo Prefecture, Thursday, May 8, 2025

I had already done this short hike in Western Tokyo on a cold winter day more than ten years ago. Since I had a chance to go hiking on a weekday morning, I thought it would be nice to redo it and see the new Spring green in the middle of Tokyo. It would also be a continuation of my recent hike between Aihara and Naganuma. Although there are no summits along the trail, I would pass by an observation deck inside Hirayamajoshi park. This hilly trail would also pass next to the Tama Zoological Park with a chance to glimpse some exotic animals.

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Start of the Hike (left) Log Steps inside the Park (right)

To get to the start of the hike, I’d ride the Keio line from Shinjuku to Hirayamajoshi-koen Station. Depending on the time, I could catch a return train from Takahatafudoson station or the closer Minami-daira station, both on the Keio line. I was hoping to see the colourful Takahata Fudoson Temple but since the section around it is through the city, I didn’t mind giving it a miss. The weather was supposed to be sunny and warm and I was looking forward to revisiting a green area inside the city of Tokyo.

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Steps for an Observation Deck (left) Path between Park and Zoo (right)

I got off the train at 9am, and after a short walk through a residential neighbourhood, I reached the start of the Nanao Hills walking path (七生散策路), marked by a signpost half-hidden by vegetation. A footpath led me up a grassy slope into the trees; I soon found myself climbing through forest along a well-defined path with wooden handrails, surprised by the sudden full-immersion into nature. A little before 10am, I reached a level open space with a view on the west side, in front of the houses of Hirayama-nichome.

Walking in Nanao Park (left) Walking next to Tama Zoo (right)

Walking on Top of (left) and Down (right) Nanao Hills

I was delighted by this unexpected view so early in the hike. Directly ahead, I could see the Okutama mountains, with Mt Odake, Mt Gozen and Mt Mito in the center; on each side, the Chichibu and Tanzawa mountains extended north and south, respectively; closeby, I could see the Southern Sky Tower next to Hachioji station; finally, on one side of the clearing, I spotted a huge Flowering Dogwood. I soon moved on, and after a short section on a paved road, reached a wooden signpost sending me up a series of steep steps on the left, leading back into the forest.

Open Space with a View at Hirayama-nichome

View of the Okutama Mountains

I was surprised by the constant birdsong, a sharp contrast to my previous hikes north of Tokyo. I soon reached a small shrine, purple azalea adding a dash of colour to the grey stone of its “torii“. From there, a level path led to the entrance of Hirayamajoshi park (平山城址公園), also the highest point of today’s hike. As I crossed the park from west to east, I marvelled at the abundance of green in every direction, more like an urban forest than a city park.

Close-up View of the Mountains surrounding Tokyo

Walking through the West Part of Hirayamajoshi Park

I could only see blue sky above the trees instead of buildings and I could only hear the song of birds, instead of city noises, since the park straddled one of the highest points of the hills. After some ups and down via log steps, I reached an observation deck in the eastern part of the park. Looking west, I could see Mt Gonzen, Mt Odake, Mt Mitake and Mt Hinode, although this view was less clear than the previous one. A little after 11am, I exited the park, and followed a connecting path between two fences, thoughtfully painted in green to match the scenery.

Walking through the East Part of the Hirayamajoshi Park

Hidamari “Sunny Spot” Platform in Hirayamajoshi Park

I was happy I could continue walking through nature, even if it was only a narrow section. I soon reached an open space above a cemetary, the Tama memorial garden, from where I had a view of the Tanzawa mountains to the south. I next followed a road for a short while, feeling quite hot under the midday sun, to a grassy path leading into Nanao Park. After some more ups and downs through beautiful greenery, the path always well-signposted, I reached a section with a chain-link fence on the right side; I knew that the Tama Zoological Garden was somewhere on the other side.

Log Steps inside Hirayamajoshi Park

Green Fence along the Connecting Path

I soon started hearing noises made by various animals although none could be seen through the vegetation. One exception was the Orangutan Forest: I was able to spot an orange lump lounging on one of the elevated platforms. This was probably the nicest section of the day as I was now following a real hiking trail, instead of a path inside a park. At one point, I had a view of the city through a gap in the vegetation on the left side. At noon, I reached a junction for Minami-daira station: here I decided to turn left and make my way back to the train station.

View of the Tanzawa Mountains from the Tama Memorial Garden

Approaching Tama Zoo

I was amazed by the steepness of the steps leading down the hillside; even though I was well inside the city, the angle of descent matched that of the mountains surrounding the Kanto Plain. Halfway down, I reached a small observation platform where I had a view of the flat city landscape extending northwards. Eventually I emerged onto a road from where it was a ten-minute walk to Minami-daira station, a forty-minute train ride back to Shinjuku.

View North Halfway down the Nanao Hills

End of the Nanao Hills Hike

I was glad I’d decided to redo this hike in Spring as the impression was quite different from my previous visit. Although the views might be better in winter, the new green scenery was stunning; the trails sections outside the parks were surprisingly well maintained and sign-posted; finally, even though the elevation is relatively low, the hilly nature of the trail made for an excellent workout. In the future, I hope to return and visit the Tama Zoo, as well as the Botanical Gardens of the Tokyo university of pharmacy and life sciences located right next to Hirayamajoshi Park.

Watch a Video of the Hike

Watch the Video of the Hike on YouTube

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