Compare the plug shapes, voltage and frequency in Japan and Kiribati, and find out which adapter you need before you travel.
Adapter required
Yes — coming from Japan, you will need a travel adapter for Kiribati. Japan uses Type A/Type B plugs, and Kiribati uses Type I, so the pin shapes will not fit any wall socket. Voltages differ (100 V at home vs 240 V abroad), so check the label on each device. Most modern dual-voltage chargers handle the swing without a converter, but heating appliances usually do not.
Voltage converter may be needed. Check your device label — most modern electronics (phones, laptops) support 100–240 V and only need a plug adapter. Hair dryers, kettles, and older appliances may need a step-up or step-down converter.
Japan (home)
Kiribati (destination)
Electrical specifications in Kiribati
Voltage
Frequency
More about plugs in Kiribati
In Kiribati, the standard power plug is Type I. The country runs on 240 volts at 50 Hz. That means every wall socket in Kiribati is the same shape — Type I, and your plug needs to physically match the socket to fit.
Full Kiribati plug guide