top of page
HammerheadSharks_Shutterstock-scaled.jpg

YONAGUNI
​与那国

HAMMERHEAD SHARK TOUR

Diving with Hammerhead Sharks in Yonaguni Island

Diving in Yonaguni Island offers an unforgettable experience, especially when you encounter the magnificent migration schools of hammerhead sharks. These remarkable creatures migrate in large numbers, providing a breathtaking spectacle for divers.

Hammerhead Shark Migration

During the migration season, divers can witness schools of hammerhead sharks numbering from 100 to 200. This is a unique opportunity to observe their graceful movements and social behavior in their natural habitat. The hammerhead sharks' distinctive head shape, known as a cephalofoil, allows them to have a wide field of vision, making them fascinating to watch as they navigate the ocean currents.

Other Marine Life

Yonaguni Island is not only home to hammerhead sharks but also hosts an array of other pelagic fish. Divers can expect to see:

  • Barracuda: Known for their sleek, torpedo-shaped bodies and powerful swimming abilities, barracudas add an element of excitement to any dive.

  • Various Shark Species: Besides hammerheads, other shark species populate the waters around Yonaguni, offering divers the chance to see different types of these majestic predators.

  • Manta Rays: These gentle giants glide gracefully through the water, captivating divers with their size and elegance.

  • Bat Rays: With their unique wing-like fins, bat rays are a delightful addition to the underwater landscape.

  • Other Pelagic Fish: A variety of species inhabit these waters, contributing to the rich biodiversity of the region.

The Yonaguni Experience

Yonaguni Island is renowned not only for its marine life but also for its stunning underwater terrain, including the famous Yonaguni Monument, a submerged rock formation that attracts divers from around the world. The island's crystal-clear waters and diverse marine ecosystem make it a top destination for diving enthusiasts.

Requirements for Diving with Hammerhead Sharks in Yonaguni

Diving with hammerhead sharks in the waters surrounding Yonaguni, Japan, is an exhilarating experience for any adventure-seeking diver. To ensure a safe and enjoyable dive, specific requirements and preparations must be met.

Diving Certification and Skills

  1. Certification: Divers must be certified as Advanced Open Water Divers or possess an equivalent certification. This level of certification ensures that divers have the experience and skills necessary for more challenging diving conditions.

  2. Buoyancy Control: Excellent buoyancy control is crucial when diving with hammerhead sharks. Maintaining steady buoyancy helps prevent unnecessary disturbances to the marine life and the underwater environment.

  3. Instruction Compliance: Divers must be able to follow instructions from the dive guide and boat staff. This is essential for safety, as these professionals are familiar with the local conditions and potential hazards.

Health and Fitness

  1. Medical Clearance: A recent medical check-up ensuring fitness to dive is recommended. This should include evaluation for any conditions that might affect diving safety.

  2. Physical Fitness: Good physical fitness is necessary to handle the demanding conditions of open water diving, including currents and variable water temperatures.

Equipment and Preparation

  1. Diving Gear: Ensure that your diving gear is in excellent condition, including your mask, fins, and wetsuit. A thicker wetsuit may be needed due to cooler water temperatures in Yonaguni.

  2. Dive Computer: A dive computer is recommended to monitor depth and time, helping to manage decompression limits.

  3. Safety Equipment: Carry a surface marker buoy (SMB) for safety, particularly in areas with strong currents.

Local Conditions and Regulations

  1. Seasonal Timing: The best time to see hammerhead sharks in Yonaguni is typically from January to March. Planning your trip during this period increases the likelihood of encounters.

  2. Dive Site Familiarization: Before diving, familiarize yourself with the dive sites and local regulations regarding marine life interactions.

  3. Environmental Awareness: Respect the marine environment by avoiding touching or disturbing marine life. Follow the "leave no trace" principles to preserve the underwater ecosystem.

By meeting these requirements and preparing adequately, divers can enjoy a safe and unforgettable experience diving with hammerhead sharks in Yonaguni.

bottom of page