Shimonoseki Marine Science Museum Kaikyokan

Introduction

Kaikyokan is formally the Shimonoseki Municipal Aquarium, run by the Shimonoseki Marine Science Academy on the Arcaport waterfront between Karato and the Kanmon Straits, with the theme 'life of the sea, the sea and life'. Shimonoseki grew out of the sea, and the museum returns to it: a vast tank reproduces the straits' racing tide, where shoals of sardines and horse mackerel coil into a silver vortex, while other galleries set the Japan Sea and the Seto Inland Sea side by side as quite different waters. The most local display is the fugu collection, where a strikingly varied range of pufferfish can be compared in one room; Shimonoseki is Japan's main fugu market, and a few steps away at Karato Market you can eat from the same supply. Humboldt penguins live in the penguin village, dolphins and sea lions perform to a daily timetable, and there are finless porpoises, turtles and deep-sea creatures. Current 2026 admission is JPY 2,500 for adults and high school students, JPY 1,200 for primary and junior high, JPY 500 from age three, with special experiences booked separately. Open 09:30-17:30, last entry 17:00, every day. From JR Shimonoseki take an ordinary Sanden bus on routes 10-24 for five minutes to Kaikyokan-mae, noting that express 121 and 127 do not stop there. Allow two or three hours, and combine the aquarium with Karato Market, Akama Shrine and a walk along the straits in one day.

✨ Highlights

🛈 Practical Info