Facility Data

Okinawa International Ocean Expo was held in Motobu, Okinawa, in 1975, and the following year the site was reborn as Ocean Expo Park (Okinawa Commemorative National Government Park Region) and designated as a National Park.

Ocean Expo Park was originally designed around the triple theme of “Sun, Sea and Flora”, with the original aquarium acting as a focal point for the “Sea” element and quickly becoming a very popular site within the Park. The old aquarium was closed in August 2002 due to the deterioration of its facilities and then reopened as Okinawa Churaumi Aquarium in November of the same year.
Okinawa Churaumi Aquarium is also certified as a Registered Museum.

Okinawa Churaumi Aquarium’s Policy
Based on the theme “Encounters with Okinawa’s Sea”, Okinawa Churaumi Aquarium presents the rich nature of Okinawa’s marine envirnoment and strives to create a place where people can encounter the abundant variety of sea life found in the Kuroshio Sea surrounding these southern isles.
While appropriately answering the demands of the time, we aim to provide a unique, high-quality aquarium that serves as an important focal point for local and international resort and tourism, and facilities that not only attract visitors but are characterized by Okinawa’s alluring, natural sea.
The Exhibition

The Exhibition

The ocean around Okinawa is made up of three elements that form the marine life habitat; 1) the massive Kuroshio warm current, 2) coral reefs, and 3) the deep sea to the east and west of the Southwest Islands. This mysterious underwater world is home to an abundant variety of globally important species.

Okinawa Churaumi Aquarium has recreated this underwater world all the way from the water’s surface to a depth of around 700m, ensuring a variety of factors – light, water quality, underwater visibility etc. – are as close as possible to conditions in the natural sea. Through a simulated journey from the coast to offshore, to the Kuroshio Sea and even to the depths of the ocean, visitors can experience the wonder and importance of Okinawa’s sea.

Our attractions go beyond merely showing a selection of fish tanks; we have created attractions that can be experienced in many ways. Moreover, our guide staff have put together a guide program that features new exhibits throughout the year, so no matter how often you visit you won’t get bored - a new experience awaits you every time!

The meaning of Churaumi

The meaning of Churaumi

– How the name “Okinawa Churaumi Aquarium” came about Chura means beautiful in the Okinawan dialect, while umi means sea.

The name “Okinawa Churaumi Aquarium” was chosen by the majority of the 13,897 respondents to our nationwide survey just prior to the reopening of the aquarium on Nov. 1, 2002. The naming committee struggled with the sheer volume of responses, but finally settled on the name Okinawa Churaumi Aquarium as it was memorable, gave a sense of locality and distinguished it from other aquariums elsewhere in Japan.

We at Okinawa Churaumi Aquarium will do our best to ensure this facility, encompassed by the beautiful Okinawan sea, finds a place in the hearts of more and more people each year.

Facility Data

Building footprint Approx. 10,000m2
Grounds area Approx. 19,000m2
Building structure 4 storey steel-reinforced concrete
Water tank size Total water volume, approx. 10,000m3
Largest tank “Kuroshio Sea” 7,500m3
Number of exhibition tanks 75
Seawater intake Intake 300m offshore at 20m depth
Maximum intake of water 3,000m3/hour
Water intake method Water conduit
Water intake conduit diameter 1.8m
Electrical supply Commercial power supply (6,600v)
Filtration system Pressurized sealed vertical type filtration tank
Water intake filters 8 units, each with 3.2m diameter
Water intake filtration media Polyester bead and fiber
Main tank filtration units 62 units, each with 2.8-3m diameter
Main tank filtration media Quartz sand

Category 1 Animal Handling Business

Okinawa Commemorative National Governmental Park Facilities (Ocean Expo Area Facilities)

Applicant The Director of the Okinawa Churashima Foundation
Name of business Okinawa Commemorative National Governmental Park Facilities (Ocean Expo Area Facilities)
Location 424 Ishikawa, Motobu-cho, Kunigami-gun, Okinawa Prefecture.
Type of animal
handling activities
Exhibition, sale.
Registration number Exhibit license no. 353, Sales license no. 353
Date of registration May 16, 2007
Registration valid until May 15, 2027
Person(s) responsible
for animal handling
Hiroshi Ashida、 Yui Kurosu