Beppu to Mokpo Road Trip: Japan to South Korea by Car and Ferry

Beppu, on Kyushu's eastern coast, and Mokpo, on Korea's southwestern tip, face each other across the Korea Strait—linked by a ferry that turns a 1,100 km detour into a short sea hop. This guide covers the overland and sea route, practical logistics, and the best stops between.

Total door-to-door time usually ranges from 9 to 11 hours, depending on ferry schedules and border procedures. The route's defining feature is the sea crossing—a break that resets your fatigue and gives you a close-up of the Tsushima Strait's traffic lanes.

Start by taking the Higashikyushu Expressway from Beppu IC to Fukuoka, then connect to the Kyushu Expressway toward Hakata Port. After the ferry, pick up the Namhae Expressway in Busan, then switch to the Seohaean Expressway south to Mokpo. Both expressways have similar speed limits (100 km/h) and well-marked signage in Japanese and Korean.

• Ferry company: JR Beetle operates a hydrofoil (Hakata–Busan, 3h10) for cars and passengers; reservations recommended in summer.
• Car rental: Most rental agencies allow one-way drop-off between Busan and Mokpo, but few allow cross-border; plan to return the car at the port and rent a new one in Korea.
• Tolls: Beppu to Hakata cost about 3,500 yen; Busan to Mokpo about 14,000 won. Total fuel cost is roughly ¥9,000 (JP) and ₩40,000 (KR) for a compact car.

For the ferry, arrive at least 1 hour before departure for car loading. The hydrofoil has a comfortable lounge and duty-free shop, but no private cabins—book a seat with extra legroom if you're tall. In Busan, the port is 20 minutes from the expressway entrance.

Specific coordinates: Beppu IC (33.2781° N, 131.5097° E) and Hakata Port (33.6089° N, 130.3975° E) in Japan; Busan Port (35.1028° N, 129.0403° E) and Mokpo IC (34.8019° N, 126.4147° E) in Korea.

In Japan, the drive from Beppu to Fukuoka hugs the coast, with views of the Seto Inland Sea and the rugged Kunisaki Peninsula. Make a short detour to Yabakei Gorge (30 km inland) for steep basalt cliffs and a suspension bridge. In Korea, the Seohaean Expressway passes through rolling hills and tidal flats; near Suncheon, don't miss the Suncheonman Bay Wetland Reserve, a UNESCO-listed Ramsar site with vast reed beds and migratory birds.

Local commerce thrives at rest stops: on the Japanese side, the Kobo rest area on the Kyushu Expressway sells regional snacks like 'hikosan milk bread' and 'buddha-shaped rice crackers.' In Korea, the Deokpyeong service area is known for its 'guljeolmi' (rice cake) and fresh oysters from nearby farms. For a longer stop, visit the beppu Jigoku (hells) hot springs—eight steaming geothermal ponds in distinct colors—before you leave.

Both countries maintain excellent road quality: Japan's expressways have continuous concrete barriers and well-lit tunnels; Korea's are equally smooth, with wide shoulders. Be aware of sudden fog and crosswinds on the coastal sections, especially in winter. The ferry ride itself is the safest leg—the hydrofoil is equipped with stabilizers and life vests.

For families, the ferry has a children's play area, and in Korea, many service areas feature indoor playgrounds—the more popular are at Iksan and Gimje. Pet-friendly framework: Japan's expressway rest areas usually have designated dog runs, but the ferry does not allow pets in passenger areas; you'll need to leave them in a ventilated carrier on the car deck. Korea has specific 'pet park' rest stops, such as the one at Hampyeong.

To avoid fatigue, plan a rest every 2 hours: green signs highlight rest areas a few kilometers ahead. In Japan, the 'Michi-no-Eki' are local cooperative rest stops with fresh produce and tourist info; try the ones at Hita and Yamakuni. In Korea, 'Jujeong-so' are more uniform, but the Boseong service area offers a scenic view of green tea fields—a perfect spot to stretch.

Hidden off-route spots exist just off the expressway: in Japan, the 'Hells of Beppu' are 10 minutes from the city, but a lesser-known one, 'Chinoike Jigoku' (Blood Pond Hell), has a distinctive red color. In Korea, the 'Mokpo Modern History Museum' (3 km from the expressway exit) is housed in a former Japanese consulate and offers a glimpse of the city's colonial past. For planning, a useful guide on how to find the best stops and hidden gems between cities can help you locate more such spots.