Internet in Okinawa: eSIM & Connectivity Tips
eSIM from 1,00 USD · 100 MB. Networks: KDDI/au (5G), NTT docomo (4G), NTT docomo (5G), Rakuten Mobile (5G), SoftBank (5G).
Connectivity in Okinawa
What you need to know: Main island well-covered; remote outer islands (Iriomote) need offline.
Known weak-signal spots in Japan
- Deep mountain areas (Nikko and Hakone lake districts)
- Remote islands (Yakushima, Iriomote in Okinawa)
- Some train tunnels on scenic rural lines
- Basement floors of dense Tokyo electronics districts
Apps you'll need
- Ride-hailing: GO (taxi), S.RIDE, DiDi Japan — you need live data to book and track rides.
- Maps: Google Maps, Apple Maps, Yahoo! Japan Maps. Download offline maps for the area before leaving your hotel.
- Messaging: LINE, WhatsApp uses only ~30 MB/hr of active chat.
Practical tip
Indoor coverage in Okinawa (shopping centres, old buildings, underground areas) is often weaker than outdoors. If you lose signal inside, step outside or connect to venue Wi-Fi. For day trips outside the city, download offline maps in advance and don't rely solely on mobile data.