[Yamaguchi, Nagato] Dive into the cobalt-blue sea! Marine Activity Special

A thorough introduction to SUP, kayaking, diving, and snorkeling experiences in Yuya Bay and Omijima Island

Nagato City, Yamaguchi is located at the westernmost tip of Honshu. A beautiful Sea of Japan stretches out here, often described as "cobalt blue" and "emerald green." With high water clarity and abundant marine life, the sea of Nagato is truly special.

＜Nagato City / Omijima Island / Scenic Views / SUP＞Omijima Island Sunset SUP Tour

The Sunset SUP Tour held on the sea in Senzaki, Nagato City, Yamaguchi is a program that lets you enjoy the scenery around Omijima Island in the Kita-Nagato Kaigan Quasi-National Park from out on the water.

Photo by Koichi(@Kfish1882)

Ride a stand-up paddleboard (SUP) and cruise along while watching the sun set into the Sea of Japan in the evening.

Nami no Hashidate, the tour venue, is a perfect sunset spot.

At the start of the program, a professional instructor will teach you how to ride and paddle, so even first-timers can join with confidence.

Another highlight is being able to observe the coastline and the island’s terrain up close from the water—letting you enjoy Nagato City’s nature from a different perspective than usual.

→ Click here to book the experience program

＜Nagato City / Omijima Island / SUP＞Sea Adventure in the Quasi-National Park! SUP Board Tour

The SUP board tour held around Omijima Island in Nagato City, Yamaguchi is an activity that takes you around the waters of the Kita-Nagato Kaigan Quasi-National Park.

You’ll paddle along while viewing the area around "Nami no Hashidate," one of the "Senzaki Eight Views"—said to have been celebrated in eight poems by children’s song poet Kaneko Misuzu in the early Showa period—right from the water.

An instructor will guide you through the basic SUP operations, so even first-timers can join while checking the fundamentals as they go.

From a different viewpoint than on land, you can observe the breakwaters lined up at Nami no Hashidate, as well as the coastal terrain and the shapes of the rocks.

→ Click here to book the experience program

＜Nagato City / Omijima Island / Kayak＞Sea Adventure in the Quasi-National Park! Sea Kayak Tour

The sea kayak tour held around Omijima Island in Nagato City, Yamaguchi is an activity that takes you around the sea of the Kita-Nagato Kaigan Quasi-National Park by kayak.

Sea kayaks are operated while seated, making them stable. Compared to SUP, where you stand, your line of sight is lower—so you can enjoy a sea stroll closer to the water’s surface.

An instructor will guide you on how to operate the kayak and on safety, proceeding carefully at your pace.

→ Click here to book the experience program

＜Enjoy the sea of Omijima Island＞Snorkeling Experience

The snorkeling experience held on Omijima Island in Nagato City is an activity where you take a walk through the underwater world of Omijima Island.

Diving shops where you can book a snorkeling experience

• Scuba Diving Kariyushi Kariyushi Omijima Store: https://omijimadive.com/
• VOXplus Box Plus: http://www.vox-plus.com/
• Omijima Diving Center: https://omijima.net/
• Diving School WITH Kitakyushu: https://kitakyu.withdive.com/
• Diving School WITH Yamaguchi: https://withdive.com/
• SeaAgain Sea Again: http://www.sea-again.work/

The waters around Omijima Island are rich in plankton, and you may see drifting organisms and other marine life.

On the tour, you’ll wear a mask, snorkel, fins, and a wetsuit.

You’ll move along near the surface and enjoy the underwater scenery of Omijima Island.

A local instructor who knows the area well will guide you and adjust the tour content according to the weather and sea conditions, so beginners can feel at ease.

What you observe and the route are decided based on the conditions of the day, letting you enjoy Omijima Island’s unique seascapes that change with the season.

→ Click here to book the experience program

＜Explore the underwater world of Omijima Island＞Diving Experience

The diving experience held on Omijima Island in Nagato City, Yamaguchi is an activity where you use dedicated equipment to dive underwater and check the marine environment while moving to a certain depth.

Diving shops where you can book a diving experience

• Scuba Diving Kariyushi Kariyushi Omijima Store: https://omijimadive.com/
• VOXplus Box Plus: http://www.vox-plus.com/
• Omijima Diving Center: https://omijima.net/
• Diving School WITH Kitakyushu: https://kitakyu.withdive.com/
• Diving School WITH Yamaguchi: https://withdive.com/
• SeaAgain Sea Again: http://www.sea-again.work/

While snorkeling focuses mainly on observing near the surface, diving involves descending underwater, allowing you to see the seafloor terrain in three dimensions and observe marine life that inhabits the Sea of Japan side.

After receiving an explanation of basic equipment operation and precautions in advance, the experience is carried out while confirming underwater movement and safety procedures.

Since the day’s content is adjusted to match the sea conditions at the time, you may be able to enjoy an underwater stroll on a different course depending on when you visit.

→ Click here to book the experience program

＜Nagato City, Yuya / Half-day course＞Enjoy Nagato’s beautiful sea! Sea Kayak Experience

The sea kayak experience held in Yuya Bay, Nagato City, Yamaguchi is a program where you paddle a kayak while tracing the bay’s coastline and inlets.

You’ll travel through the highly transparent waters of Yuya Bay in Nagato City, and you can even cross over to an uninhabited island offshore.

With guidance from a guide, you’ll proceed while checking paddle operation and how to get in and out of the kayak, so even first-timers can join while confirming the basics.

You’ll move along the course while enjoying commemorative photos at each spot.

Why not capture some memories with the beautiful sea as your backdrop?

→ Click here to book the experience program

＜Nagato City, Yuya / 1-day course＞Enjoy Nagato’s beautiful sea! Sea Kayak Experience

The 1-day sea kayak course held in Yuya Bay, Nagato City, Yamaguchi is a program where you spend about 6 hours touring the bay, taking your time to enjoy the beautiful sea and natural environment.

After receiving an explanation of basic paddle operation and safety before departure, you’ll move along the course following the guide’s instructions.

As you travel across the water’s surface, you can enjoy the bay’s terrain and underwater scenery, with content that visits multiple areas such as offshore and coastal zones.

Along the way, you’ll stop by an uninhabited island and beaches, with time set aside for lunch, breaks, and photos.

Related Links

・Activities you can enjoy in Nagato City

・Nagato Experience Program "Nagatotrip"