Nagasaki tide times

Gunkanjima (Battleship Island, formally Hashima Island) is a 0.063 km² artificial island 18 km southwest of Nagasaki, built up as a submarine coal mine from 1887 to 1974. At peak occupancy (1959) it housed 5,259 people — the world's highest recorded population density. The island was abandoned when the coal mine closed in 1974; the concrete buildings and mine infrastructure have been decaying since. UNESCO World Heritage listed in 2015. Day boat tours from Nagasaki harbour visit the island; landing is permitted on a controlled boardwalk through part of the outer section.

Mean spring range at Nagasaki harbour is approximately 2.0 metres. The Goto-retto island chain and the East China Sea produce a complex tidal pattern in the outer approaches; the harbour amplifies the tidal exchange. The inner harbour fish culture (traditional weir fishing for mullet and sea bream using tidal flow) is practiced in the shallow sections at the river mouths and uses the tidal cycle actively for fish trapping.

The Nagasaki Atomic Bomb Museum is one of the most carefully curated and accessible accounts of nuclear warfare in any language. It presents the physics of the bomb, the human death toll (estimated 70,000–80,000 deaths in 1945, with long-term radiation illness affecting many more), survivor testimonies, and the international context of 1945. It is not graphic for its own sake; it is sobering and important. The Peace Park adjacent includes the hypocenter marker and an international memorial garden. Allow 2 to 3 hours; combined visit with the Hiroshima Peace Memorial Museum gives the most complete understanding.

Dejima was a fan-shaped artificial island in Nagasaki harbour where the Dutch East India Company (VOC) maintained Japan's only permitted trading post during the Edo period (1641–1853). The Dutch were the only Europeans permitted to trade with Japan during this 212-year isolation; the island housed Dutch merchants and the goods they exchanged with Japanese brokers. It was the sole conduit for European knowledge and goods to Japan during the period. The reconstructed Dejima is now a historical museum near the modern waterfront, with period-accurate buildings, artifacts, and English-language interpretation.

By shinkansen (bullet train): Tokyo to Hakata (Fukuoka) on the Tokaido-Sanyo Line in 5.5 hours, then the Nagasaki Shinkansen (Nishikyushu Shinkansen, opened 2022) from Takeo-Onsen to Nagasaki in 23 minutes (total journey with connection: about 6.5 hours). By air: JAL and ANA fly Tokyo Haneda to Nagasaki in 1.75 hours (multiple daily flights). The flight is significantly faster for most itineraries; the shinkansen is useful for JR Pass holders.