GMT/UTC +9 (Greenwich Mean Time)
Tokyo is 9 hours ahead of Greenwich Mean Time.
Generally 9 hour a head of UK; 14 hours ahead of New York; 17 hours ahead of San Francisco; 1 hour behind Sydney; 3 hours behind Auckland (These may vary when daylight saving hours take effect)
Daylight Saving Time
Currently no daylight saving time takes place in Japan
100V (Two flat prongs )
It is safe to drink tap water.