Convert JST to IST
See the current time difference between Japan Standard Time and India Standard Time, compare hours, and plan meetings fast.
How Conversion Works
JST is UTC+9 and IST is UTC+5:30, so IST is 3 hours 30 minutes behind JST. Enter any time to convert it instantly between Japan Standard Time and India Standard Time.
Hour-by-Hour Time Table
Use the visual grid and hour-by-hour table to compare JST and IST across the day. Export selected times with ICS download or send them to Google Calendar and Gmail.
Schedule Meetings Accurately
Find overlapping business hours between Japan and India and avoid timing mistakes. Time data adjusts automatically using the IANA timezone database, including any historical rule changes.
How to Convert JST to IST
Open the JST to IST converter: Go to https://www.xconvert.com/time-converter/jst-to-ist-converter to load a visual comparison grid with JST and IST ready for side-by-side viewing. This is useful when you are scheduling a supplier call between Tokyo and India, coordinating a software handoff with an engineering team, or checking whether a Japan-based client meeting lands inside Indian office hours.
Add comparison cities if your workflow spans more than one market: Click + Add City and search for cities that matter to your schedule, such as Tokyo for Japan operations, Mumbai for Indian business coordination, or Dublin and Tel Aviv if you also work with other regions that use the IST abbreviation in different contexts. This helps multinational teams in manufacturing, IT services, logistics, and consulting avoid confusion when one abbreviation can refer to India, Ireland, or Israel depending on the business relationship.
Select the time range on the grid: Click Select to enter selection mode, then drag across the JST row to highlight the hours you want to compare; the selected range appears in purple and can be adjusted with the left and right handles or moved by dragging the center. For example, dragging from 9:00 JST to 12:00 JST shows 5:00 IST to 8:00 IST, which quickly tells you that a standard Tokyo morning starts very early in India and may not suit a full team meeting.
Export and share the selected time block: After selecting a range, use the export options for ICS download, Google Calendar, Gmail, Copy to clipboard, or Share link to send the converted schedule to colleagues. This is especially practical for cross-border project managers who need a confirmed Tokyo-to-India meeting slot to appear correctly in each participant’s local calendar without manual reconversion.
Understanding the JST to IST Time Difference
JST is Japan Standard Time (UTC+9) and IST is India Standard Time (UTC+5), so IST is 4 hours behind JST. In practical terms, when the workday begins in Japan, India is still earlier in the morning, which affects daily standups, vendor check-ins, and customer support coverage between the two countries.
The fixed examples make the gap easy to remember: 9:00 JST = 5:00 IST, 12:00 JST = 8:00 IST, 15:00 JST = 11:00 IST, and 18:00 JST = 14:00 IST. These examples are useful for recurring business coordination because they show that a late afternoon slot in Japan maps neatly into late morning or early afternoon in India, often making it easier to find overlap than with a Tokyo morning meeting.
JST does not observe DST, so Japan keeps the same time standard throughout the year. IST can refer to multiple regions, and its DST counterpart is IDT, which means the JST-to-IST difference can change during the parts of the year when a DST-observing IST region switches away from standard time; during those months, confirm the exact date on the converter before booking anything important.
Best Times for Calls and Meetings Between JST and IST
For Japan–India coordination, the most practical overlap usually appears from midday to early evening in JST, because that converts into morning to early afternoon in IST. The clearest examples are 12:00 JST = 8:00 IST, 15:00 JST = 11:00 IST, and 18:00 JST = 14:00 IST, which create a more realistic shared window than 9:00 JST = 5:00 IST.
A 9:00 JST meeting is generally too early for most India-based office teams because it lands at 5:00 IST, before a standard business day starts. By contrast, 15:00 JST = 11:00 IST is often a strong option for product reviews, procurement discussions, and remote team standups because both sides are well inside normal working hours.
If you need a broader collaboration block, selecting 12:00 JST to 18:00 JST gives you 8:00 IST to 14:00 IST based on the listed examples. That range is especially useful for industries that depend on same-day communication between Japan and India, including software development, automotive supply chains, electronics sourcing, and back-office operations.
Frequently Asked Questions
What is the time difference between JST and IST?
JST is 4 hours ahead of IST, which means IST is 4 hours behind JST. A simple way to think about it is that Japan reaches the same point in the day earlier, so a Tokyo afternoon often lines up with an India late morning or early afternoon.
When is 9 AM JST in IST?
9:00 JST = 5:00 IST. This is an important conversion for teams planning morning meetings from Japan, because 5:00 AM is usually too early for a normal India office schedule unless the meeting is urgent or part of a rotating support shift.
When is 12 PM JST in IST?
12:00 JST = 8:00 IST. This can work for early coordination with India-based teams, especially for project updates, logistics confirmations, or pre-market operational checks, but it is still earlier than many standard office start times in India.
When is 3 PM JST in IST?
15:00 JST = 11:00 IST. This is one of the most practical conversion points for live meetings, since both Japan and India are comfortably within daytime business hours and can handle calls, demos, or approvals without pushing into very early or very late schedules.
When is 6 PM JST in IST?
18:00 JST = 14:00 IST. This is often a strong choice for end-of-day coordination from Japan because it still lands in the middle of the workday in India, making it suitable for status reviews, vendor communication, and same-day issue resolution.
Does the difference between JST and IST change during DST?
JST does not observe DST, so Japan stays on the same time standard all year. IST is a standard-time abbreviation, and its DST counterpart is IDT, so the JST-to-IST difference can change during the months when a DST-observing IST region is on daylight time rather than standard time.
What is the best meeting time between JST and IST?
The best meeting times are usually in the JST afternoon, because the listed conversions show a much better overlap for India: 12:00 JST = 8:00 IST, 15:00 JST = 11:00 IST, and 18:00 JST = 14:00 IST. Among these, 15:00 JST / 11:00 IST is often the most balanced option for regular business meetings, while 18:00 JST / 14:00 IST works well when Japan needs more of its local workday before the call.
Which countries use JST and IST?
JST is used in Japan. IST can refer to standard time used in India, Ireland, and Israel, which is why a converter page is helpful when you need to make sure everyone is talking about the same IST before sending a calendar invite.