Tokyo is 7-8 hours ahead of Geneva. Geneva uses Central European Time (CET/CEST, UTC+1/+2) while Tokyo uses Japan Standard Time (JST, UTC+9). During standard time, Tokyo is 8 hours ahead; during daylight saving time, Tokyo is 7 hours ahead.
Geneva observes daylight saving time while Tokyo does not, so the difference varies seasonally.
Best calling time: Early morning Geneva time. Calling at 7:00 AM - 11:00 AM Geneva time catches 3:00 PM - 7:00 PM in Tokyo during summer (or 2:00 PM - 6:00 PM in winter).
Geneva and Tokyo are both centers for international organizations and finance. Geneva hosts the UN and WHO, while Tokyo is Asia's financial hub. Swiss watches and Japanese precision engineering share a reputation for quality.