Use this JST to RET time converter to compare Japan and Réunion time instantly. RET is 5 hours behind JST, so 9:00 AM JST becomes 4:00 AM RET and 5:00 PM JST becomes 12:00 PM RET. The page is useful for business-hours overlap, international calls, remote-team handoffs, webinars, and travel planning, with daylight saving adjustments handled automatically.
Use this JST to RET converter to compare Japan and Réunion time, check the 5 hours gap, and confirm the right slot for calls, handoffs, and deadlines. Good overlap starts around 2:00 PM JST / 9:00 AM RET.
Converting between Japan Standard Time and Reunion Time means accounting for a 5 hours gap — here's how to do it in under 10 seconds with no sign-up.
Pick the date and time in Japan Standard Time (UTC +9) that you want to convert. Hit "Now" to load the current JST time instantly, or use "+1h" to step forward and compare.
The equivalent Reunion Time (UTC +4) time appears immediately. Since RET is 5 hours behind of JST, most daytime conversions stay on the same calendar day.
Click "Copy Time" to grab the RET result for your calendar or message. Use "+1d" to check how the conversion shifts across dates — useful when Daylight Saving Time changes the gap.
When someone in Japan suggests 2:00 PM JST, that's 9:00 AM RET. This converter shows the overlap so both sides agree on one slot — no back-and-forth.
Late-night JST times can land on a different date in RET because of the 5 hours offset. The converter labels "next day" or "previous day" next to the result so you never send a message a day early or miss a deadline.
Daylight Saving adjustments can widen or narrow the JST–RET gap by an hour. During transition weeks many people get it wrong. This converter pulls the current UTC offsets automatically, so the result is right even on the changeover day.
Product launches, sports matches, and webinars are often announced in JST. Convert the event time to RET so you know exactly when to tune in — with a 5 hours difference, a morning event in Japan falls during work hours in Réunion.
Quick-reference conversion table covering every hour of the day at a glance.
Japan Standard Time to Reunion Time full day schedule
| Japan Standard Time | Reunion Time |
|---|---|
| 12:00 AM |
7:00 PM
(previous day)
|
| 1:00 AM |
8:00 PM
(previous day)
|
| 2:00 AM |
9:00 PM
(previous day)
|
| 3:00 AM |
10:00 PM
(previous day)
|
| 4:00 AM |
11:00 PM
(previous day)
|
| 5:00 AM |
12:00 AM
|
| 6:00 AM |
1:00 AM
|
| 7:00 AM |
2:00 AM
|
| 8:00 AM |
3:00 AM
|
| 9:00 AM |
4:00 AM
|
| 10:00 AM |
5:00 AM
|
| 11:00 AM |
6:00 AM
|
| 12:00 PM |
7:00 AM
|
| 1:00 PM |
8:00 AM
|
| 2:00 PM |
9:00 AM
|
| 3:00 PM |
10:00 AM
|
| 4:00 PM |
11:00 AM
|
| 5:00 PM |
12:00 PM
|
| 6:00 PM |
1:00 PM
|
| 7:00 PM |
2:00 PM
|
| 8:00 PM |
3:00 PM
|
| 9:00 PM |
4:00 PM
|
| 10:00 PM |
5:00 PM
|
| 11:00 PM |
6:00 PM
|
Japan — one of the few large economies that has no DST, so JST is JST year-round (UTC+9). Business hours 9 AM – 6 PM JST with strong presence-based culture (staying past 7 PM is common). Same offset as Korean Standard Time (KST).
Explore more JST conversions for major business and travel corridors. Each page includes a 24-hour chart, time difference summary, and meeting overlap guidance.
Find the time difference from any major zone into Reunion Time. Use these pages when scheduling with Réunion from a different region.
