Japan seems to overcome the frequency issue somehow: https://secure.wikimedia.org/wikipedia/en/wiki/File:Power_Grid_of_Japan.PNG https://secure.wikimedia.org/w

Japan seems to overcome the frequency issue somehow: https://secure.wikimedia.org/wikipedia/en/wiki/File:Power_Grid_of_Japan.PNG https://secure.wikimedia.org/wikipedia/en/wiki/File:Power_Gr... Half of the country operates at 50Hz and the other half at 60Hz: "In Japan, the western part of the country (Kyoto and west) uses 60 Hz and the eastern part (Tokyo and east) uses 50 Hz. This originates in the first purchases of generators from AEG in 1895, installed for Tokyo, and General Electric in 1896, installed in Osaka. The boundary between the two regions contains four back-to-back HVDC substations which convert the frequency; these are Shin Shinano, Sakuma Dam, Minami-Fukumitsu, and the Higashi-Shimizu Frequency Converter."