Tokyo is 9 hours ahead of Dublin during GMT, and 8 hours ahead during IST (Irish Summer Time). Dublin uses GMT/IST while Tokyo uses Japan Standard Time (JST, UTC+9). When it's 9:00 AM in Dublin, it's 6:00 PM (GMT) or 5:00 PM (IST) in Tokyo.
Japan does not observe daylight saving time while Ireland does, so the difference varies between 8-9 hours throughout the year.
Best calling time: 8:00 AM - 10:00 AM Dublin time. This corresponds to 5:00 PM - 7:00 PM (GMT) or 4:00 PM - 6:00 PM (IST) in Tokyo, catching late afternoon business hours in Japan.
Dublin and Tokyo share growing ties in technology and pharmaceuticals. Several Japanese tech companies have European headquarters in Dublin, while Irish companies increasingly target the Japanese market.