About this spot
Nishihama sits on Aka Island in Okinawa Prefecture, Japan, offering consistent diving conditions throughout the year. The site features healthy coral ecosystems with no current bleaching stress, making it a reliable choice for reef exploration. Twelve documented species observations confirm the area's biodiversity, from small reef fish to larger pelagics that move through the waters seasonally. The reef structure supports a mix of hard and soft corals typical of Okinawa's subtropical waters. Visibility and depth vary by season and tide, so check conditions locally before diving. The absence of marine protection area designation means fewer restrictions, though responsible diving practices help preserve the reef. Aka Island is accessible from Naha, Okinawa's main port city. Local dive operators on the island can arrange boat access to Nishihama and provide current site-specific guidance. Community video documentation shows the site's appeal to both recreational and experienced divers exploring Japan's Kerama Islands region.
📖 Guide: Diving in Japan: 42 Sites from Sharks to Stone Monuments
Best months
Marine life
Dive types
Trip essentials
Everything you need before you pack — checklist, sun, logistics.
Trip checklist
- 🛂 Visa-free or visa-on-arrival
- 📜 C-card + dive insurance (DAN)
- 📔 Dive logbook
- 🧴 Reef-safe sunscreen SPF 50+
- 🔌 Plug type A/B · 100V adapter
- 💊 Seasickness meds + ear drops
- 📱 Offline maps + emergency contact
Quick facts
- 🌓 Moon First quarter · 49%
- GPS
› Sustainability disclosures
FAQ
›When is the best time to dive Nishihama?
Nishihama is diveable year-round. Summer (June–August) brings warmer water but can have lower visibility due to rain and runoff. Winter (December–February) offers clearer water and cooler temperatures. Spring and fall provide moderate conditions with stable weather.
›What depth and difficulty level is Nishihama?
Depth and difficulty vary by specific site conditions and entry point. Local dive operators on Aka Island can brief you on current conditions, recommended entry methods, and suitable difficulty levels for your experience.
›What marine life will I see?
Twelve recorded species observations confirm the site hosts reef fish, corals, and other marine organisms typical of Okinawa's subtropical reefs. Larger pelagics and seasonal visitors may appear depending on conditions and time of year.
›How do I get there and do I need permits?
Aka Island is reachable by ferry from Naha. Nishihama is not within a marine protected area, so no special permits are required. Contact local dive operators on the island for boat access, current conditions, and any local guidelines.
