Skip the main picnic spots and hike straight to the Third Battery ruins. These weathered brick bunkers feel like a live-action Ghibli film, perfect for your next photo dump. Take the 20-minute ferry from Kada Port, but pack your own water and snacks because the island has zero shops. Wear actual sneakers, not slides, and budget three hours for the overgrown trails. Keep a portable charger handy because you will drain your battery shooting the ruins.
Stepping onto these islands feels like wandering into a landscape abandoned by time, where nature slowly reclaims sturdy brick structures once meant for military defense. You will find yourself walking through damp tunnels and grassy clearings that feel far removed from the city pace. The attraction lies in the quiet decay of these heavy fortifications rather than pristine maintenance or tourist polish. It is a raw experience for those who prefer wandering through overgrown ruins to reading plaques or browsing souvenir shops. These islands demand curiosity from visitors willing to navigate uneven, unpaved terrain without modern comforts or convenience stores.
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Travel to Kada Port in Wakayama to catch the local ferry service. The crossing takes approximately twenty minutes, but verify the weather conditions before heading out, as service stops during high winds.
Carry all necessary water and food items with you from the mainland, as there are no vendors, shops, or cafes operating on the islands. Pack out everything you bring to keep paths clear.
Wear sturdy, closed-toe sneakers or hiking boots with good grip. The trails are uneven and often overgrown, making sandals or flimsy flats a poor choice for navigating the brick ruins and dirt paths.
Arrive on the first morning ferry to access the Third Battery area before the larger groups arrive. Most visitors stick to the lower paths, so head toward the furthest lighthouse viewpoints for solitude.
Exercise extreme caution, as the interior brick corridors are dark, slippery, and lack modern safety lighting. Bring a high-powered flashlight or headlamp if you plan to explore the deeper tunnel sections properly.