Oku-Oi Kozyo Station: A Scenic Lake Station Hidden in Japan’s Mountains

Introduction – A Platform Between Mountains and Water

There are train stations, and then there are destinations in their own right.
In the remote heart of Shizuoka Prefecture, Oku-Oi Kozyo Station appears to float above a deep green lake—connected only by a narrow red bridge, surrounded by steep forested hills.
This remarkable station, perched over Lake Sessō, earned a Cool Japan Award in 2019 and is quickly becoming a magnet for seasoned travelers seeking scenery far from the usual routes.

Getting There — The Abt Line Railway Adventure

Reaching Oku-Oi Kozyo Station is half the experience.
From Senzu Station, you’ll board the charming Abt Line (part of the Ōigawa Railway), which zigzags its way through the Southern Alps on narrow-gauge mountain tracks. Though the line is famous for steep inclines and one of Japan’s few rack railway segments, no switchbacks occur on this particular route.
The final approach over the lake—on a bridge with water on both sides—is unforgettable.

Viewpoint Above the Lake — The Perfect Shot

Once at the station, you’ll find a walking path extending from the platform itself. Follow it alongside the rails, then hike about 20 minutes uphill to reach the Rainbow Bridge Viewpoint.
From this elevated perch, you can gaze down at the station, bridge, lake, and surrounding mountains—a panoramic blend of engineering and untouched nature.
On a clear day, the lake's surface glows emerald green, shifting with light and season.

Locks of Love — A Ritual for Travelers

Locals sometimes refer to it as Oku-Oi Kojo Station, blending the Japanese word for “love lock” (恋錠, koijō) into the name.
At the platform, you’ll find a spot where travelers fasten small heart-shaped padlocks—a playful gesture to mark a moment, a memory, or a wish.
You can purchase these locks at Ōigawa Railway gift shops and leave your symbol of friendship, love, or wanderlust hanging above the lake.

Extend Your Journey — Hike to a Hidden Onsen

For those who want to go deeper, there’s a hiking trail from the station to Sesso Gorge Onsen, taking about one hour on foot.
This route leads you through forest paths and lakeside views, rewarding your effort with the chance to soak in natural hot springs surrounded by mountain quiet.
It’s a perfect way to round out a day of slow travel and scenery.

Closing Thoughts – One of Japan’s Most Photogenic Train Stops

Oku-Oi Kozyo Station isn’t just photogenic—it’s one-of-a-kind.
It offers a moment of pause, a different pace of travel, and a chance to witness the delicate balance between Japan’s natural splendor and its thoughtful engineering.

You won’t find cafés, souvenir shops, or crowds here. What you will find is a scene that feels almost surreal—and a photograph that tells the story of a journey few others have made.

ℹ️ Travel Information

• Location: Kawanehon Town, Haibara District, Shizuoka Prefecture

• By Train: From Senzu Station, take the Ōigawa Railway Abt Line for approximately 70 minutes

• By Car: About 30 minutes from central Kawanehoncho Town

• Official Website: https://oi-river.com/places/295

• Contact: Kawanehon Town Town Development Tourism Association — TEL: 0547‑59‑2746

🚫 Traveler Etiquette

• Please do not enter the railway tracks at any time.

• The station is entirely non-smoking.

• Carry out all trash and use the restrooms at Lake Cottage Oku-Oi respectfully.

• Be mindful of nature, and fellow travelers enjoying the peace of the area.