Numazu

Numazu is a coastal city in Shizuoka Prefecture along the northern Izu coast, facing the Philippine Sea. It serves as a gateway to the Izu Peninsula's dive sites, with several local dive centers offering shore and boat trips to nearby reefs, walls, and kelp zones. The area features a mix of shallow coastal sites suitable for beginners and more drift-friendly spots for experienced divers, plus access to freshwater training at nearby Lake Hinuma. Conditions are typically temperate, with seasonal oceanography shaping visibility and currents. While Numazu itself is not a major global dive hub, it provides practical access to a handful of local dive sites and services for day trips, weekend expeditions, and aquatic training in the wider Shizuoka region.