Frequently Asked Questions
English answers are machine-translated from the property's Japanese information. Please confirm important details with the property directly.
Or browse the answers we’ve already prepared below.
These answers were written by AI from the property's official website. The property has not checked them. Collected on August 11, 2026. Prices and times may be out of date, so please confirm anything important with the property.
Access (1)
How do I get to the Genkai Undersea Observation Tower?
It stands inside Hadomisaki Seaside Park, about 40 minutes by car from JR Karatsu Station or about 5 minutes from the Nagoya Castle Museum. By public transport, take a local bus from Karatsu Station and alight at a stop for Hadomisaki.
Experiences (1)
What is the projection mapping like?
Introduced in the April 2024 renovation, it projects onto a 360-degree ceiling screen inside the tower. A five-minute film with sound tells a story and makes you feel you are under the sea. It is especially popular with young children and elementary school pupils.
Nearby spots (1)
Are there other sights nearby?
A heart-shaped sculpture marking a Lovers' Sanctuary stands right by the tower. Nearby are also the Hadomisaki artificial beach, stalls selling grilled turban shell and the Hadomisaki campsite.
For children (1)
Is it safe and enjoyable with children?
Under-school-age children enter free, and the projection mapping is especially popular with young children and elementary school pupils. The pier and the inside of the tower have places where footing needs care, so please keep small children with an adult.
Time needed (1)
How long does a visit take?
Seeing the tower takes about 30 minutes to an hour. The fish visible change with the season and the weather, so allow extra time if you want to watch closely.
Prices (1)
How much is admission?
Prices were revised when the tower reopened on 1 April 2024: general 1,000 yen, elementary and junior high school students 500 yen, under school age free.
Facility overview (1)
How is the tower built?
It is a cylindrical tower 20 m high and 10 m across, linked to the shore by an 86 m pier. From the deck above the water you can see the islands of the Genkai Sea on three sides, and the observation room 7 m below the surface lets you watch the sea as it is.
Highlights (1)
What sea life can I see?
Through the 24 windows of the observation room 7 m below the surface you can watch about 30 species of fish, including horse mackerel, black sea bream and sea bass, along with seaweed and shellfish. Warm and cold currents meet around Hadomisaki, so tropical fish also appear, and in autumn you can see shoals of sardines glinting in the water.
雨天・荒天時 (1)
Does it close in bad weather?
It may close at short notice in bad weather such as strong wind or high waves. Please check the official website or call 090-3464-5337 before visiting.
Parking (1)
Is there parking?
There is parking for about 200 cars in Hadomisaki Seaside Park (partly charged), with an area that also takes coaches.
Other (6)
How much is admission?
General 1,000 yen, elementary and junior high school students 500 yen, under school age free (revised 1 April 2024).
When is it closed?
It may close at short notice in bad weather (please check).
What are the opening hours?
10:00-17:00 (varies by season; it may close at short notice in bad weather).
What is the address?
1628-1 Hado, Chinzei Town, Karatsu City, Saga Prefecture
How do I get there?
About 40 minutes by car from JR Karatsu Station. About 5 minutes by car from the Nagoya Castle Museum. It is inside Hadomisaki Seaside Park.
Is there parking?
Parking is available. Please check the official information for details.