JST to IST converter
Japan Standard Time → India Standard Time
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Japan Standard Time (JST) is UTC+9 with no daylight saving. It covers Tokyo, Osaka and Sapporo (Seoul shares the same clock).
India Standard Time (IST) is UTC+5:30 with no daylight saving. It covers Mumbai, Delhi, Bengaluru and Chennai.
India Standard Time is typically 3½ hours behind Japan Standard Time, all year round — neither zone observes daylight saving.
Best time to call India Standard Time from Japan Standard Time
Office hours overlap for about 4.5 hours a day: 12:30 PM–5:00 PM in Japan Standard Time is 9:00 AM–1:30 PM in India Standard Time. Book calls inside this window and nobody is out of hours.
JST to IST, hour by hour
Today's actual offsets. Rows where both zones are inside 9am–5pm working hours are highlighted.