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Nanatsugama (Karatsu City, Saga Prefecture)

2025 11/16
November 16, 2025

[Overview (history, characteristics, attractions)]
Nanatsugama is a group of sea caves and strangely shaped rock formations facing the Genkai Sea in Yobuko Town, Karatsu City, Saga Prefecture. Erosion by long years of waves and wind has created holes and arches in the coastal rock, resulting in the appearance of a series of around seven caves and kama (holes), hence the name. The contrast between the rugged scenery of the Genkai Sea and the blue ocean is beautiful, and the fact that it can be viewed up close on a pleasure boat makes it a popular tourist spot. The color of the ocean on a clear day, and the changing appearance depending on the lighting in the morning and evening, are particularly appealing. Yobuko is also famous for its fresh squid, so enjoying a meal while sightseeing is another attraction.

[Highlights]
- Close-up view from a sightseeing boat: You can see the entrance to the cave and the formations of the sea cave from the sea side on a sightseeing boat, and enjoy the impressive scenery. Depending on the weather and calmness of the sea, the boat may even get close to the cave.
– View from the shore: You can see the whole view from the observation points and promenades along the coast. The highlights are the majesty of the cliffs and rock formations created by the waves, combined with the horizon in the distance.
- Different seasons: The beauty of the sea changes with the seasons and time of day, from the emerald green sea on a sunny day, to the dramatic sight of white waves and cliffs during stormy weather, to the silhouettes at dusk.
- Yobuko Seafood: Enjoy fresh squid and seafood dishes at the Yobuko Morning Market and restaurants before or after sightseeing.

[Access (nearest station, transportation, etc.)]
- Train + Bus: The nearest major station is JR Karatsu Station. From Karatsu Station, take a bus (Showa Bus, etc.) bound for Yobuko and get off at Yobuko Port/Morning Market (approximately 30-45 minutes). The number of buses varies depending on the route, so it is recommended to check in advance.
- By car: Approximately 30-40 minutes from central Karatsu City via national or prefectural roads (depending on traffic congestion and routes). There are tourist parking lots and paid parking lots around Yobuko.
- Sightseeing boats: Sightseeing boats generally depart from Yobuko Port (near Yobuko Morning Market). The required time varies depending on the boat, but most tours around the caves take about 20 to 30 minutes. Boats may be canceled due to weather or sea conditions, so please check the operation status before departing.

[Estimated stay (estimated time required)]
- Tour by pleasure boat only: Approximately 40 minutes to 1 hour, including waiting time for the boat.
– Sightseeing (cruise boat + shore view + meal): Approximately 1.5 to 3 hours.
– Sightseeing in the surrounding area (day trips including Karatsu Castle and Rainbow Pine Grove): Half a day to a full day.

[Nearby spots]
– Yobuko Morning Market: A morning market lined with fresh seafood and local specialties. Many people visit this market in conjunction with sightseeing.
– Karatsu Castle (Maizuru Park): Located in the center of Karatsu City, this castle offers a great view from the castle and a stroll around the surrounding area.
- Rainbow Pine Grove: One of Japan's three largest pine groves, stretching along Karatsu Bay. Recommended for drives and walks.
– Kagamiyama: A viewing spot with a panoramic view of Karatsu city and the sea.
- Other coastal scenic spots and restaurants in fishing towns: The area around Yobuko is rich in seafood, so you can enjoy eating your way around.

[Points to note (crowds, manners, seasonal precautions, etc.)]
- Cancellation due to sea conditions: The weather and sea conditions in the Genkai Sea are changeable, and sightseeing boats may be canceled if the wind or waves are strong. Please check the operating company's information before departing.
- Crowds: The sightseeing boats and Yobuko Morning Market are crowded during Golden Week, summer vacation, and weekends. Please purchase your boat ticket early or consider making a reservation in advance if possible.
- Safety precautions: There are many stairs and steps at the observation decks on the shore and at the sightseeing boats, and some areas can be slippery when wet. Comfortable walking shoes are recommended. Please wear a life jacket and follow all instructions on board.
- Manners: Always take any trash you leave on the beach or in tourist areas with you or dispose of it in the designated area. Avoid entering rocky areas or dangerous areas, and do not collect trash without permission.
- Photography: You can take photos near the cave, but please be careful not to disturb other tourists. Be careful not to drop your smartphone or camera on the boat.
- Seasonal clothing: The sea breeze can be strong, making the temperature feel lower. Wear a jacket in spring and autumn, windproof and cold-resistant clothing in winter, and sun protection in summer (a hat and sunscreen).
- Barrier-free information: Many areas around the observation decks on the shore and the sightseeing boat terminal have steps, so access for wheelchairs and strollers may be limited. It is best to inquire at each facility in advance.

Please refer to the above and check the weather and sailing status before visiting to enjoy the trip even more. Enjoy the magnificent seascape of Nanatsugama along with the fresh seafood of Yobuko.

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