OK Marine Pro

This dive site, OK Marine Pro, is an urban-type indoor diving school located just a 4-minute walk from Nerima Station in Tokyo, Japan. Established in 1960, it has a long history of teaching diving. The facility occupies the first and second floors for its diving pool, with reception on the third floor. Divers navigate a controlled environment with two distinct depth sections: a shallow 1.2-meter area and a deeper 5-meter section, ideal for training and skill development. As an indoor swimming pool facility, this dive site does not feature any natural marine animals or plants. The environment is entirely man-made, designed for human diver training rather than marine ecosystem observation. The best time to visit OK Marine Pro is year-round, as it's an indoor facility unaffected by weather or sea conditions, making it perfect for consistent training. It's an excellent location for beginners to gain confidence, practice fundamental skills, and for certified divers to refresh their techniques. Freedivers can also utilize the deeper sections for breath-hold training in a safe, controlled setting.