If you plan to use a polarized plug, you will need a universal travel power plug adapter. Purchase an adapter that will accept both polarized and grounded plugs. Universal plugs are also known as all-in-one adapters because they have a selection of plug converter options in one small plastic, lightweight device. These can be found for less than $5 each online.
Before departing on your trip, examine the plug converter to learn how it functions. Insert your polarized plug in the receiving side and extend the double straight prongs on the other side to practice operating the device.
Upon arrival in Japan, plug your adapter into the wall, then plug your electronic power cord into the converter.
Japan has no grounded power plug receptacles. If you plan to travel with electronics that require a three-prong grounded outlet, you must acquire a universal travel power plug converter. Purchase one that accepts both grounded and polarized plugs.
Practice inserting the grounded plug into the converter before leaving the U.S. Also practice pulling out the two prongs you will use in Japan. It saves time and frustration to examine new equipment before your trip, so you know how to operate it upon your arrival at your destination.
When you check in to your accommodations in Japan, plug the universal converter into the wall before attaching your electronic device.
