Tokyo is 8-9 hours ahead of Lisbon. Lisbon uses Western European Time (WET/WEST, UTC+0/+1) while Tokyo uses Japan Standard Time (JST, UTC+9). During standard time, Tokyo is 9 hours ahead; during daylight saving time, Tokyo is 8 hours ahead.
Japan does not observe daylight saving time, while Portugal does, so the difference varies seasonally.
Best calling time: 12:00 AM - 9:00 AM Lisbon time. This corresponds to approximately 9:00 AM - 6:00 PM in Tokyo during daylight saving time. Morning calls from Lisbon work best.
Lisbon and Tokyo are capital cities on opposite ends of Eurasia. Portugal has historical connections to Japan dating back to the 16th century. Today, both are modern capitals with growing business ties.