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  1. Home
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  3. Kagawa
  4. Onigashima Cave
Onigashima Cave
Onigashima Cave
Onigashima Cave
Onigashima Cave
Kagawa

Onigashima Cave

3.9 (672)Scenic SpotNature PreserveTourist AttractionParkPoint Of InterestEstablishment

Onigashima Cave is located on Megijima Island in the Seto Inland Sea, approximately 20 minutes by ferry from Takamatsu Port in Kagawa Prefecture, Japan. The cave derives its name from the legendary island of Onigashima, meaning "Demon Island," which appears in the famous Japanese folktale of Momotaro, the Peach Boy who defeated ogres with the help of animal companions.

The cave system stretches approximately 400 meters into the island's rocky interior and was originally created through natural erosion processes, though parts were later expanded for defensive purposes. Historical records suggest the caves were used as fortifications during Japan's Sengoku period in the 16th century, when local warlords utilized the natural formations for military advantage. The association with the Momotaro legend has made this site a significant cultural landmark, connecting visitors to one of Japan's most beloved folk stories.

Inside the cave, visitors encounter a series of chambers decorated with colorful demon statues and displays that recreate scenes from the Momotaro tale. The atmospheric lighting enhances the mythological ambiance, while the cool interior provides respite during summer months. The walk through the cave system takes approximately 30 to 40 minutes, following a well-maintained pathway that includes some stairs and uneven surfaces. The cave exit opens to a scenic observation point offering panoramic views of the Seto Inland Sea and neighboring islands.

Megijima Island can be reached by regular ferry service from Takamatsu Port, with boats departing multiple times daily and the journey costing around ¥370 one way. From the ferry terminal, Onigashima Cave is accessible via a 15-minute walk uphill or by rental bicycle available near the port. Admission to the cave costs ¥500 for adults and ¥250 for children. The island also features the Setouchi Triennale art festival every three years, during which contemporary art installations complement the historical cave attraction.


Hours
Sunday: 7:40 AM – 4:40 PM
Monday: 7:40 AM – 4:45 PM
Tuesday: 7:40 AM – 4:45 PM
Wednesday: 7:40 AM – 4:45 PM
Thursday: 7:40 AM – 4:45 PM
Friday: 7:40 AM – 4:40 PM
Saturday: 7:40 AM – 4:40 PM
Phone
+81 87-873-0211
Website
www.onigasima.jp


The area

Address
2633 Megichō, Takamatsu, Kagawa 760-0092, Japan

Hours

Sunday: 7:40 AM – 4:40 PM
Monday: 7:40 AM – 4:45 PM
Tuesday: 7:40 AM – 4:45 PM
Wednesday: 7:40 AM – 4:45 PM
Thursday: 7:40 AM – 4:45 PM
Friday: 7:40 AM – 4:40 PM
Saturday: 7:40 AM – 4:40 PM

Phone

+81 87-873-0211

Website

www.onigasima.jp

What other travelers are saying about Onigashima Cave

I came here while I was on vacation and it was really fun. Getting to the cave takes a ferry and bus ride, all of which are fairly easy to purchase. Look up the ferry departure times and arrive about 20 minutes early to get a ticket. You'll want the extra time just in case you have trouble figuring out which ticket to buy. The workers at the docks are very friendly and will give you directions if you ask. After the ferry, you'll arrive at a visitor center. You can either hike to the cave or purchase a bus ticket at the visitor center and get a ride to the mouth of the cave. It's pretty easy even if you don't understand much Japanese. Have a translator app handy. After the bus ride, you'll buy a ticket to the cave, and you're free to explore. The cave's association with Momotaro is fun, but the actual history of it being discovered by a school principal (or teacher?) is just as charming. There are several ceramic tiles or emblems depicting oni decorating the cave made by school children that are very old (I was sad to see a few falling apart, but I guess that's expected). There are oni statues there to help illustrate the legend of Momotaro too. The cave is only about 10 different rooms or so, so you can go through it pretty quick. If you are claustrophobic, I'd advise against it. I have a fear of being trapped under rubble or things falling on top of me, but I didn't feel nervous. Just be aware that there are some tight spaces. Once you are done with the cave, there are several paths going to various parts of the island you can explore. All are easier hikes, though the humidity and heat might make it a little challenging if you aren't accustomed to it. I loved my experience. My only critique was how you needed to purchase three separate tickets to get to the cave (ferry/return - bus - cave entrance, though all three were inexpensive). The website has no means of purchasing any of those tickets (maybe the ferry but I bought mine in person). And the bus schedule is managed by another company and not readily available online. If they offered some kind of large ticket for the ferry rides, bus ride, and cave entrance, it would greatly streamline the process and might even encourage more visitors.
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Mike (DiademInDross)
Oct 27, 2025
It is must visit spot on island! You can choose to walk up, renting a bicycle to get to there or take a bus instead! For bus as i remember is 600 yen per ride! The price of visiting the cave is 600yen! I think it is worthwhile to pay for! Since not many people come here, therefore only me in the cave that day! The cave is full of myterious and a bit scary! Because it reminds me of a horror movie: travellers want to adventure in a cave, however there are human-like creatures living in that cave! They will kill and eat people there! BUT IT IS ONLY IN MOVIE! The cave i have visited in Takamastu is so safe! And i think it is so magical, if you stay inside the cave, it is sooo cool inside just like an air conditioner turned on inside! It is really a stunning natural views in Japan! If you want to do exercise in Japan, you can walk up to the cave! It takes you around 3-4hours for round trip! Remember to bring more water with you!
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J0 K
Sep 4, 2023
Cave is small but nearby there's a great view of all the islands. Bus times are scheduled in sync with ferry arrival and departure times.
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Ann We
May 18, 2023
a round trip to the bus for 800 yen 500 yen one way entrance fee to the cave 600 yen Pay only 500 yen for the bus one way The dispatch is an hour The cave can be seen in 15 minutes Walk down
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neo choo
Jul 9, 2024
Do worthy to go when you are here. It’s definitely an unique experience
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Shut hung Yiu
Jul 2, 2025

Nearby attractions to see

Hiketa Castle Ruins

Hiketa Castle Ruins

Teshima Art Museum

Teshima Art Museum

Megijima Island

Megijima Island

Shikoku Aquarium

Shikoku Aquarium

Nearby attractions to see

Hiketa Castle Ruins

Hiketa Castle Ruins

Teshima Art Museum

Teshima Art Museum

Megijima Island

Megijima Island

Shikoku Aquarium

Shikoku Aquarium


Frequently Asked Questions

Take a ferry from Takamatsu Port to Megijima Island. The journey takes 20 minutes and costs ¥370 one way, with multiple departures daily. From the ferry terminal, walk uphill for 15 minutes or rent a bicycle near the port to reach the cave entrance.

Onigashima means "Demon Island" and is believed to be the setting from the Momotaro folktale, where the Peach Boy defeated ogres. The cave contains demon statues and displays recreating scenes from this story, making it a physical representation of the legendary location from Japanese folklore.

Exploring the cave takes 30 to 40 minutes. The pathway includes stairs and uneven surfaces, which may be challenging for visitors with mobility issues. The route is maintained and lit, with the exit leading to an observation point overlooking the Seto Inland Sea.

The island hosts art installations during the Setouchi Triennale, held every three years. It also has beaches, hiking trails, and fishing villages with local restaurants. The island is small enough to explore multiple sites in one day trip.