Churaumi Aquarium and Nakijin Castle Ruins — World-Class Aquarium and Ryukyuan Heritage

Located in Motobu Town and Nakijin Village of Okinawa, the Churaumi Aquarium and Nakijin Castle Ruins are two representative sightseeing spots of northern Okinawa main island, known as Yanbaru. The Churaumi Aquarium is famous for its Kuroshio Sea tank, one of the world largest, where whale sharks and manta rays swim serenely, letting you feel the life of Okinawa sea up close. About 30 minutes away by car, Nakijin Castle Ruins is one of the Ryukyu largest castle sites and a World Heritage site, and the view from its walls overlooking the sea is spectacular.

Highlights

The Kuroshio Sea tank at the Churaumi Aquarium is on a scale of about 7,500 tons of water, with an acrylic panel 8.2 m tall, 22.5 m wide, and 60 cm thick, where you can watch large fish such as whale sharks and reef manta rays swim with overwhelming power. It is known as one of the few facilities in the world keeping whale sharks.

• Whale shark feeding: feeding commentary is held several times a day at the Kuroshio Sea tank, letting you watch the powerful scene up close
• Nakijin Castle Ruins (World Heritage): a castle site registered in 2000 as part of the Gusuku Sites and Related Properties of the Kingdom of Ryukyu. The view of northern Okinawa from the walls atop the hill is superb
• Cherry blossoms at Nakijin Castle: known as one of Okinawa earliest-blooming cherry spots, where Kanhi cherry blossoms color the ruins from late January to early February
• Okichan Theater: the outdoor dolphin show adjacent to the aquarium is very popular with families, and viewing is free

Enjoying the Seasons

In spring (March to May), many tourists visit during Golden Week, so you sightsee in a lively atmosphere. Summer is Okinawa peak season, when many people visit the aquarium as part of a trip. Autumn is relatively quiet, allowing an unhurried visit. In winter (January to February), the Kanhi cherry blossoms of Nakijin Castle bloom, and many visitors come for the scenery of blossoms and castle walls.

Practical Travel Notes

• The feeding commentary and dolphin show have set times, so check the times on the in-house notices when you enter and plan your route efficiently
• Ocean Expo Park parking is free. The grounds are large, so comfortable walking shoes are recommended
• Nakijin Castle Ruins has many slopes and stone steps, so easy-to-walk clothing is reassuring. In some years an illumination period is held at night during cherry season
• The aquarium and Nakijin Castle are about 30 minutes apart by car. To see both in one day, doing the castle and blossoms in the morning and the aquarium in the afternoon helps avoid crowds

Access and Basic Information

• Churaumi Aquarium location: 424 Ishikawa, Motobu Town, Kunigami District, Okinawa (inside Ocean Expo Park)
• About 2 hours by car from Naha Airport, or roughly 2 hours 30 minutes by highway bus from central Naha
• Churaumi Aquarium hours: normally 8:30 to 18:30 (last admission 17:30). Hours are extended in some summer periods
• Admission: 2,180 yen for adults
• Nakijin Castle Ruins is about 30 minutes by car from the aquarium (admission 600 yen for adults)

A Word of Advice

Ocean Expo Park is vast, with many attractions beyond the aquarium, such as the Tropical Dream Center and the Okinawa Folk Village. It is recommended to allow half a day to a full day for your visit. The cherry season at Nakijin Castle (late January to early February) is a valuable chance to enjoy cherry blossoms earlier than on the mainland during an Okinawa trip.

📚 Sources

This article draws on information published by the Okinawa Churashima Foundation, which operates the Okinawa Churaumi Aquarium, and by Ocean Expo Park, together with materials from Nakijin Village and the Agency for Cultural Affairs on the World Heritage Nakijin Castle Ruins, and in-park guidance for the Okichan Theater and the whale shark feeding commentary. References to the Hikanzakura cherry blossoms and the cherry festival follow Nakijin Village tourism guidance. Opening hours, admission fees, the times of feeding commentary and dolphin shows, and the cherry festival schedule may change, so please confirm details on each facility official website before visiting.

Visitor Checklist

• Estimated time: Ocean Expo Park is large with many sights beyond the aquarium, so allow half a day to a full day.
• What to bring: Wear comfortable shoes for the wide park; Nakijin Castle Ruins has many slopes and stone steps, so easy-to-move clothing helps.
• Check the times: Feeding commentary and dolphin shows run on set schedules, so check the in-park signage on entry and plan your route.
• Checking fees: The Churaumi Aquarium is about 2,180 yen for adults and Nakijin Castle Ruins about 600 yen; parking at Ocean Expo Park is free.
• Getting around: The aquarium and Nakijin Castle Ruins are about 30 minutes apart by car; visiting the ruins and cherry blossoms in the morning and the aquarium in the afternoon helps avoid crowds.