Koza River Nukumi

This dive site offers a unique freshwater river diving experience in the clear Furuza River, renowned for its pristine conditions. Divers can explore the upstream areas, located approximately an hour from Furuza town, which are particularly known as prime locations for observing the elusive giant salamander. While the site does not have a specific historical narrative or complex navigation requirements, divers typically navigate by exploring specific pools, rock formations, and areas where currents naturally concentrate marine life. The primary and most significant animal attraction is the Japanese giant salamander, a designated special national natural monument. Beyond this majestic amphibian, the river teems with various stream fish including amago, eels, ayu, catfish, warts, and mole. The smaller ecosystems are vibrant with crustaceans such as mole crabs and shrimps, alongside other amphibians like the red-bellied newt, and diverse freshwater insects such as goatfish and kingfish. The best time to visit for observing the giant salamander is generally in the upstream areas, although specific seasonal details are not provided. Divers and freedivers should be prepared for freshwater conditions, which may include cooler temperatures compared to ocean diving. The shallow depths make this site ideal for beginners, macro photography enthusiasts, and those seeking a truly unique freshwater biodiversity experience. Proper weighting and buoyancy control are advisable for navigating the river's currents.