The posters are correct that there is no difference unless you do professional video or your business deals with precise power equipment. You'll then see a flicker in the video or power fluctuations working in the Northern half of Japan due to the frequency drop from 60 to 50hz. read more
Check your need for a power plug (travel) adapter in Japan. In Japan the power sockets are of type A and B. The standard voltage is 100 V and the frequency is 50 / 60 Hz. read more
Nov 2, 2012, 11: 27 AM The only concern is heat generating equipment (portable water heater, hair dryer, etc..) with a polarized plug, or 3-prong plug (some laptops). read more