Okinawa Travel Adapters
Type A • 100 volts • 60 Hz
Okinawa was the seat of the independent Ryukyu Kingdom from 1429 until Japan formally annexed it as Okinawa Prefecture in 1879, giving the islands a distinct history and culture separate from mainland Japan for over four centuries.
Okinawa is a region of Japan located in East Asia, consisting of a chain of islands in the East China Sea between mainland Japan and Taiwan. The capital city is Naha. Major destinations include Okinawa City, Chatan, and the Kerama Islands. Okinawa is known for its subtropical climate, beaches, and coral reefs.
Okinawa uses mains electricity supplied at 100 volts at 60 Hz, following western Japan's power standard rather than the 50 Hz grid used in eastern Japan. Wall outlets use Type A plugs. Travelers from regions that use different plug types should bring a compatible travel adapter; visitors should confirm that their devices support 100–240V input or use an appropriate voltage converter if necessary.
What Plug Type Does Okinawa Use?
Click image for adapter details
Adapter may also be spelled adaptor. Converter may be spelled convertor. Grounded may also be described as earthed.
Okinawa uses Type A outlets, the same ungrounded two flat-pin plug shape used across Japan and similar to the US plug. Okinawa runs on western Japan's 60 Hz grid rather than the 50 Hz grid used in eastern Japan, though most modern electronics handle either frequency without issue.
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Do I need a voltage converter for Okinawa?
Only if your device isn't dual voltage. Most phones, laptops, and cameras are rated for 100–240V and only need a plug adapter for Okinawa's outlets. High-wattage single-voltage appliances, like hair dryers, straighteners, or some CPAP machines, need a voltage converter, not just an adapter. Check the device label for its voltage rating before you travel.
Can I use my US phone charger in Okinawa?
Most modern phone and laptop chargers are rated for 100–240V, so they work on Okinawa's 100V supply without a separate converter. You'll still need a plug adapter, since Okinawa's Type A outlets have slightly narrower slots than some US plugs.
Are Okinawa and US power outlets interchangeable?
Mostly, but not always. Okinawa uses the same ungrounded Type A plug shape as the US, so many US plugs fit directly. However, Okinawa's supply runs at 100V versus 120V in the US, and some US plugs have blades slightly too wide for Japanese outlets, so a plug adapter is still recommended for a reliable fit.
Why is Okinawa's frequency 60Hz when parts of Japan use 50Hz?
Japan runs two separate power grids at different frequencies: eastern Japan, including Tokyo, uses 50Hz, while western Japan, including Osaka and Okinawa, uses 60Hz. Most modern electronics handle either frequency without issue, but it's worth checking the label on frequency-sensitive devices.
