Station Innai

Discover Japan’s Hidden Stone Bridge Heritage

Nestled along National Route 387 in Innai, a serene village in Usa City, Oita Prefecture, the roadside station Innai stands as a gateway to one of Japan’s most remarkable stone bridge collections. With 75 historic bridges spanning the Yakkangawa River system, this region is a living testament to Edo-era craftsmanship, where ancient stone arches blend seamlessly with nature and local life.

At Innai, visitors can explore interactive exhibits on the bridges, view preserved specimens of the nationally designated giant salamander, and enjoy locally crafted yuzu products. Don’t miss the on-site restaurant, I Shibashi Cha-ya, where the acclaimed Usa Tempura Set and local catfish hotpot are must-try specialties. Whether exploring cultural heritage, savoring regional flavors, or simply resting along the scenic highway, Innai offers a deeply authentic rural experience.

Visit Innai roadside station to experience Japan’s largest concentration of historic stone bridges—75 in total—many illuminated at night and celebrated in local festivals. Only here can you explore a dedicated exhibit on the national natural monument, the giant salamander, and taste authentic Uzumaki yuzu products made from the region’s famed citrus. The standout meal? The acclaimed Uoza tempura set, a local specialty unavailable elsewhere.

• Best Arrival Time: Arrive by 9:00 AM to access the full range of fresh produce at the Stone Bridge Station shop before midday sales begin, as the morning harvest of local citrus and seasonal vegetables is often sold out by 11:30 AM.

• Hidden Gems: Visit the Stone Bridge Station information counter between 8:30 AM and 9:00 AM to receive a free printed map of the 75 historic stone bridges in the area, including lesser-known routes like the Bird Bridge and Hara-se Bridge, which are not marked on standard maps.

• Weekend Special: On weekends, visit the i Shibashi Tea House restaurant between 11:00 AM and 12:30 PM to enjoy the limited-time seasonal menu featuring fresh local eel and grilled vegetables, available only during the summer months.

• Best Food Purchase: Buy the "Yuzu Miso Ramen" and "Yuzu Tofu Salad" from the Stone Bridge Station deli counter before 2:00 PM, as these items are prepared in limited batches each day and are often sold out by early afternoon.

• Electric Vehicle Tip: Use the fast-charging station for electric vehicles located near the parking lot between 10:00 AM and 2:00 PM when the staff is present to assist with access and confirm availability, as the station is not monitored outside of these hours.

• Tourist Experience: Participate in the free guided walking tour of the stone bridges offered by the station’s staff on the first and third Sundays of each month at 10:30 AM, departing from the Stone Bridge Station information booth.

• Local Product Alert: Purchase the "Yuzu Kōya" preserved citrus product at the Stone Bridge Station shop before 1:00 PM, as this item is restocked only once per day and frequently sells out by 1:30 PM.

Spring (March-May): Hosts the Inna Stone Bridge Marathon in March and features fresh bamboo shoots at the market.

Summer (June-August): Offers seasonal zaru udon and zaru soba, with cool relief from the region's humid climate.

Autumn (September-November): Celebrates the Fukujo Site Festival in October and showcases vibrant fall foliage near the stone bridges.

Winter (December-February): Provides peaceful visits to stone bridges with minimal crowds and scenic winter views.