Japan to American Samoa: No adapter needed
Your Japan plugs fit American Samoa's sockets directly -- no adapter needed for the shape. Voltage is compatible (100V vs 120V), so any dual-voltage or matching device is fine either way.
Your Japan plugs fit American Samoa's sockets directly -- no adapter needed for the shape. Voltage is compatible (100V vs 120V), so any dual-voltage or matching device is fine either way.