What is the time difference between Tokyo and Rome?

Tokyo (JST, UTC+9) is 8 hours ahead of Rome during CET (UTC+1, winter) and 7 hours ahead during CEST (UTC+2, summer). Japan does not observe Daylight Saving Time, so the offset changes only when Italy shifts its clocks in spring and autumn.

Does Tokyo observe Daylight Saving Time?

No. Japan abolished DST in 1952 and has not used it since. Tokyo stays on JST (UTC+9) all year. Only Rome shifts its clocks, which is why the Tokyo-Rome gap alternates between 8 and 7 hours.

When does the offset change between 8 and 7 hours?

Italy moves clocks forward on the last Sunday in March at 02:00 CET, entering CEST (UTC+2). At that point the Tokyo-Rome gap narrows from 8 hours to 7 hours. The gap widens back to 8 hours on the last Sunday in October at 03:00 CEST when Italy reverts to CET (UTC+1).

What are the best meeting times when calling from Tokyo to Rome?

In CET (winter), Tokyo at 17:00–18:00 JST corresponds to Rome at 09:00–10:00 CET — the opening of the Rome workday. In CEST (summer), Tokyo at 16:00–18:00 JST maps to Rome at 09:00–11:00 CEST. Early Tokyo afternoon is the best overlap window.

Is this tool accurate for scheduling?

Yes. It uses the IANA timezone database embedded in your browser — the same source used by operating systems and calendar apps worldwide. Accuracy depends on your device clock being synchronized via NTP, which most devices do automatically.

What is CET and CEST?

CET (Central European Time) is UTC+1, used by Italy and much of continental Europe in winter. CEST (Central European Summer Time) is UTC+2, observed from the last Sunday in March to the last Sunday in October. Rome switches between them automatically.

Time Difference: Tokyo to Rome

See the current time in Tokyo and Rome side by side, with the live UTC offset (JST is UTC+9; Rome is CET UTC+1 in winter, CEST UTC+2 in summer), updated every second.

Tokyo, Japan

--:--:--

JST UTC+9

Rome, Italy

--:--:--

CET UTC+1

Current Offset

+8 hours

Tokyo is 8 hours ahead of Rome

Convert Tokyo Time to Rome Time

Based on the current offset — updates automatically

Tokyo (JST)	Rome (CET/CEST)

Meeting Overlap Finder

Business hours (09:00–18:00) highlighted — best overlap shaded

Tokyo (JST)	Rome (CET/CEST)	Status

Summary

This tool displays the live current time in both Tokyo (Asia/Tokyo — JST, UTC+9 year-round, no DST) and Rome (Europe/Rome — CET in winter at UTC+1, CEST in summer at UTC+2) side by side. Because Tokyo never observes Daylight Saving Time while Rome does, the offset between the two cities changes twice a year: Tokyo is 8 hours ahead of Rome during CET (UTC+1) and 7 hours ahead during CEST (UTC+2). Use this tool to schedule calls from Japan to Italy, coordinate remote teams, or find overlapping business hours.

How it works

Your browser reads the current moment from your device clock.
It converts that moment to Asia/Tokyo time (JST, UTC+9) using the IANA timezone database built into modern browsers.
The same moment is converted to Europe/Rome time (CET UTC+1 in winter, CEST UTC+2 in summer).
The UTC offsets of both cities are compared to calculate the exact hour difference.
All three values — Tokyo time, Rome time, and the offset — refresh every second.
When Rome switches between CET and CEST, the displayed offset adjusts automatically between +8 and +7 hours.

Use cases

Scheduling video calls between Tokyo and Rome offices.
Checking if a colleague in Rome is still at their desk.
Planning Japan-Italy travel and arrival time comparisons.
Remote teams coordinating daily standups across Japan and Italy.
Finding overlapping business hours for Tokyo-Rome meetings.
Converting a Tokyo meeting time to its Rome equivalent.
Journalists in Tokyo checking broadcast times for live Italian events.
Students and teachers arranging online lessons between Japan and Italy.

Frequently Asked Questions

Last updated: 2026-06-11 · Reviewed by Nham Vu