Going In Style Adapter Plug America to Japan Non Grounded A Polarized Premium Non-grounded adapter plugs allow electrical connections up to 240 volts An adapter plug does NOT change the current or voltage (this requires a converter) unless your appliance is dual voltage This adapter may NOT be used with appliances that have grounded plugs; for these you will need a grounded adapter. Model# GIS-A1025 Japan outlets are not required to be polorized (one flat pin larger) like in the US