The Akiyoshidai Skyline is a scenic road running through Akiyoshidai Quasi-National Park in Mine City, Yamaguchi Prefecture.
Officially part of Yamaguchi Prefectural Route 242, the route stretches around 10 km from the entrance of Akiyoshido Cave to the central plateau, including stops at Akiyoshidai Observatory and Chojagamori Forest Park.
It features gentle elevation changes and flowing curves, situated at an altitude of 300–400 meters. The open highland landscape and smooth roads attract motorcyclists from across Japan, especially during spring and autumn.
Highlights & Attractions
Akiyoshidai is the largest karst plateau in Japan, dotted with white limestone rocks across vast grassy plains.
While riding, you’ll enjoy wide-open vistas, the soft curve of the hills, and views stretching to the Chugoku Mountains.
Top spots include:
- Akiyoshidai Observatory – a panoramic view over the karst landscape
- Chojagamori – a quiet natural park surrounded by highland scenery
Each season offers a new visual experience: fresh greens in spring, deep green meadows in summer, and golden fields of Japanese pampas grass in autumn.
Road Conditions & Safety
- Fully paved and well-maintained road surface
- Moderate curves with a mostly beginner-friendly layout
- Occasional strong crosswinds, especially in spring and fall
- Fog is common in the morning and evening – ride with headlights on and keep a safe speed
Parking areas for motorcycles and cars are available along the route, especially near observatories and trailheads.
Recommended Stops
- Akiyoshido Cave: One of Japan’s largest limestone caves, cool even in summer
- Akiyoshidai Observatory: The best vantage point for panoramic photos
- Karstar Geo Park Center: Informative displays on geology and natural history
- Chojagamori Forest Park: Peaceful trails and seasonal cherry blossoms in spring
Many local cafes and restaurants are rider-friendly, offering parking and rest spots.
Local Foods
- Kawara Soba (sizzling green tea noodles on a hot tile plate – a regional specialty)
- Choshu Chicken dishes such as fried chicken and hearty set meals
- Highland soft-serve ice cream, skewers, and snacks near Akiyoshido Cave
Access & Parking
- About 20–30 minutes from Mine IC or Ogori IC on the Chugoku Expressway
- Free parking available at major sightseeing spots
- Some parking lots have dedicated spaces for motorcycles and tour buses
Best Seasons
- Spring (Apr–Jun): Mild temperatures and fresh greenery
- Summer (Jul–Sep): Bright skies and vibrant grassland scenery
- Autumn (Oct–Nov): Golden pampas grass, crisp air, and morning mist
- Winter (Dec–Feb): Snow is rare, but be cautious of potential frost or icy roads
Touring Sample Plan (Half-Day)
Start in Mine City
→ Visit Akiyoshido Cave (~1 hour)
→ Ride the Akiyoshidai Skyline
→ Stop at observatories for photos
→ Lunch or break at Chojagamori Forest Park
→ Return to central Mine