Montezuma, Moctezuma, Moteczoma, Motecuhzoma, Moteuczomah, and Mwatazuma are variant spellings of the same word and may refer to:
Voltage, Frequency and Plug/Outlet Type in United States of America / USA. Electricity in United States of America / USA is 120 Volts, alternating at 60 cycles per second. If you travel to United States of America / USA with a device that does not accept 120 Volts at 60 Hertz, you will need a voltage converter.
You can use your electric appliances in Japan, if the standard voltage in your country is in between 110V and 127V (as in the US, Canada and most South American countries). Manufacturers take small deviations (plus or minus 5%) into account. If the standard voltage in your country is in the range of 220V - 240V (as in the UK, Europe, Asia, Africa and Australia), you need a power converter in Japan. To be sure, check the label on the appliance.