Gunkan-Jima

The next morning at 5 A.M., I was in the crowd of fishermen at the pier. There were two girls in the crowd who obviously weren’t attempting to enjoy fishing on the wall. They also had a plan to explore deep inside of the island, so we decided to act together. It took 20-30 minutes to reach the island wall by small boat, and the captain said, “I’ll be back here in just one hour and you must be here. If you’re not here it’s not my problem.” 
The exploration started on the north side of the island. First, we stood quietly in front of the run-down condominiums and elementary school building. It was a breathtaking and tranquil view that I’ve never seen before. Next, we went deep into the residential area in the middle of the island. There were many household goods from the 70s on the floors, like newspapers, empty coke bottles, manga magazines, and so on. It was like a cine-film. Each condo had at least 10 stories and almost all buildings were linked by skyways! It was a really modern city in those days. We absolutely didn’t cross the skyway with the high risk of falling. 
After 20 min. we reached the south wall of the island, the bow of the battleship. Next, we went to the east of the ship where there were holes to the entrances of the coal mine, and we found half-buried holes there. There was an elevated tramroad for coal to be transported to the loading-place on the sea. Our time on the island was almost up and we hurried to the north wall for boarding. Our one-hour adventure was safely over when we successfully boarded the small ferry boat. It was one of the most impressive activities among my curious place hunting tours. 

Today, you can join the landing tour legally on Gunkan-Jima and the official homepage is here: https://www.gunkanjima-concierge.com/en/. So the private exploration of the island isn’t recommended at all due to safety concerns.