I'm traveling from
No adapter needed
Your Type A plugs fit outlets in the United States.
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Your Type A plugs fit outlets in the United States, so your chargers plug straight into the wall.
Home is 100V, the United States is 120V. Phone and laptop chargers marked "100-240V" work anywhere. Single-voltage gear like hair dryers and straighteners needs a converter, or a dual-voltage travel version.
Only for single-voltage gear like some hair tools. Phone and laptop chargers don't need one.
Only for single-voltage gear. Skip it if everything you pack says 100-240V.
Look for
Everything to sort before you fly from Japan.
Small things that make long travel days easier, whichever outlet you end up next to.
Keeps your phone going on travel days. Carry it on; airlines ban power banks from checked bags.
Look for
One dual-voltage charger for phone, laptop and watch, so you need one adapter.
Look for
Hotel outlets are rarely next to the bed. Two metres reaches.
Look for
NEMA 1-15
Used in both Japan and the United States
NEMA 5-15
Outlets in the United States
