This dive site, Ida, located in Numazu City, Shizuoka, Japan, is renowned as a premier beach diving destination in Nishi Izu. It is particularly famous for its exceptionally clear 'Ida Blue' waters. Divers navigate a gentle rocky slope, making it accessible and enjoyable for all skill levels. There is no specific historical information provided for this site.
The site boasts rich and diverse marine life. Divers can expect to encounter vibrant schools of snapper, hawkfish, and yellowtail. For macro enthusiasts, there's an abundance of unique creatures such as frogfish and various species of nudibranchs. While specific plant types aren't detailed, the rocky slope provides a habitat for a thriving ecosystem.
Ida is a favorite among divers year-round due to its consistent appeal. Seasonal highlights include the opportunity to observe spawning squid and sightings of majestic sea turtles, offering fantastic photographic opportunities for both macro and wide-angle photography. Its gentle conditions make it ideal for both freedivers and scuba divers of all experience levels.

