Do I need a voltage converter for my phone?

No. Modern smartphones, tablets, and laptops have dual-voltage chargers (100V-240V). Just use a simple plug adapter.

Will my US tech work with Japanese outlets?

Yes, but Japanese outlets are often non-polarized (both slots are the same size). If your device plug has one wider prong, it might not fit. Bring a cheap 2-prong converter if your chargers are older.

Is public WiFi reliable?

It is spotty. It is better to pack a portable WiFi router rental or an eSIM for your family devices so you aren't reliant on finding public access points.

How to pack your tech gear for a family trip to Japan

Prioritize a high-capacity portable power bank, a universal travel adapter with multiple USB ports, and Apple AirTags for your luggage. Keep all lithium batteries in your carry-on, as Japan strictly enforces safety regulations for high-capacity batteries in checked bags.

Select the right adapter. Japan uses Type A (two flat parallel pins) outlets, which are identical to the US standard. Ensure your electronics support 100V (Japan's voltage). If you have European-style plugs, you will need a Type A adapter, ideally one with at least three USB-C ports to charge tablets and phones simultaneously.
Consolidate your charging cables. Use a single 65W or 100W GaN (Gallium Nitride) wall charger. These are small, lightweight, and powerful enough to charge a laptop, a tablet, and two phones at once, saving you from carrying four separate power bricks.
Organize in a tech pouch. Use a dedicated tech organizer with elastic loops. Keep cables, dongles, and earbuds together. If you’re bringing a laptop, ensure it is in a sleeve that fits inside your main carry-on, as you will need to remove it at security checkpoints.
Check battery capacity. Your power bank must be under 27,000 mAh (100Wh) to pass standard airline security. Always carry this in your hand luggage. If you carry a larger professional camera battery, confirm the Wh rating is clearly labeled.

Do I need a voltage converter for my phone?: No. Modern smartphones, tablets, and laptops have dual-voltage chargers (100V-240V). Just use a simple plug adapter.
Will my US tech work with Japanese outlets?: Yes, but Japanese outlets are often non-polarized (both slots are the same size). If your device plug has one wider prong, it might not fit. Bring a cheap 2-prong converter if your chargers are older.
Is public WiFi reliable?: It is spotty. It is better to pack a portable WiFi router rental or an eSIM for your family devices so you aren't reliant on finding public access points.