Cocomo Osezaki

COCOMO OSEZAKI is situated in the Osezaki area of Numazu, Shizuoka, providing a gateway to the diverse marine environments of the Izu Peninsula. The centre is defined by its specialised focus on boat diving, serving as the sole provider for boat-based excursions in this specific part of Osezaki.

The local topography allows for a wide range of diving experiences. You can choose between sheltered bay dives, exploring the point, or heading out to the open sea to encounter different marine landscapes and varied topography.

The team is composed of experienced instructors and guides capable of managing a broad spectrum of divers. Whether you are looking for your first experience in the water through a discovery dive or you are an experienced diver seeking autonomous diving under specific conditions, the staff is equipped to assist.

For those returning to the water after a long break, the centre offers ReActivate programmes to ensure you are comfortable and confident before heading out on a dive. They also facilitate specialty training and various certification levels to help you progress your skills.

The centre provides a comprehensive range of training, from initial C-Card certifications to more advanced specialisations. They offer the Self-Reliant Diver Specialty for those looking to refine their independent diving skills.

For divers who have had an interruption in their diving activities of more than six months, the ReActivate course is available to refresh your skills and ensure safety. The instruction is tailored to accommodate both beginners and those looking to progress through their certification levels.

The centre operates boat diving services, making it the primary choice for those wanting to reach the offshore sites around Osezaki. These trips allow you to access the open sea and the more remote rocky structures that are not reachable from the shore.

Full equipment hire is available on-site for those not travelling with their own kit. To ensure comfort during the colder months, the centre provides heated vests for rental, which can be particularly useful during the February to April season.

Nitrox is available for use, providing more flexibility for your dive planning. The centre also supports modern payment methods, including credit cards and QR code payments.

The marine life around Osezaki is varied, with the rocky structures of sites like Hotoke Iwa providing diverse habitats. You can find a range of species depending on whether you are exploring the sheltered bays or the more exposed open sea points.

Macro enthusiasts will find plenty to observe, with the different reef structures supporting a variety of smaller creatures. The transition from the reef flat to the deeper sections often brings a change in the types of life you encounter.

In the open water areas, you may encounter larger species, including ribbonfish. The diverse topography of the Osezaki coastline ensures that the local ecosystem remains active and varied for divers of all levels.

The diving environment in Osezaki can be influenced by local weather patterns. It is noted that the wind tends to pick up in the afternoon, which can affect surface conditions.

Because the centre offers both bay diving and open sea boat dives, the choice of site often depends on the swell and wind conditions present on the day of your dive.