At a Glance
Fixed-Time Commitments
Day by Day
Flights Β· ANA
Bullet Trains Β· Shinkansen
Hotels
Attractions & Passes
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Useful Japanese
Power & Adapters
Japan runs 100V, 50Hz (Tokyo) / 60Hz (KyotoβOsaka) with the same flat 2-prong Type-A sockets as the US (120V). Short answer: you donβt strictly need the TESSAN adapter.
Phones, iPads, laptops, power banks, watch/ring chargers: all dual-voltage (100β240V) β plug straight in.
3-prong (grounded) US plugs: some outlets are 2-prong only β the one case the adapter helps. Bring it as light insurance.
Curling iron & hot brush: if labeled 100β240V youβre fine; if 120V-only it runs a touch cooler at 100V (safe, just weaker). An adapter wonβt change voltage.
Money & Connectivity
Cash still matters. Pull yen from 7-Eleven (7-Bank) or Japan Post ATMs (take foreign cards). Many stalls & shrines are cash-only.
Suica / IC card. On iPhone, add Suica in Apple Wallet instantly; on Android use the Mobile Suica app or grab a physical card at the airport. Everyone taps their own at gates.
T-Mobile Go5G Plus includes data in Japan β you may not need an eSIM. If you add an Airalo eSIM, set it as the data line and keep T-Mobile for your number.
Tax-free at Β₯5,000+ with your passport saves 10% β keep sealed bags closed until you leave Japan.
Good to Know
June = tsuyu (rainy season). Warm, humid, frequent showers β packable umbrella + light rain layer.
Carry a hand towel (few paper towels) and a small trash bag (scarce bins).
Temples & some restaurants need shoes off β slip-ons + clean socks help, especially with kids.
Observation decks often ban bags up top (lockers provided) and run strict timed-entry windows β travel light and carry passports.