What is the time difference between Tokyo and Prague?

Tokyo (JST, UTC+9) is 8 hours ahead of Prague in summer (CEST, UTC+2) and 9 hours ahead in winter (CET, UTC+1). Japan does not observe Daylight Saving Time, so the offset changes only when Prague 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 Prague shifts its clocks, which is why the Tokyo-Prague gap alternates between 8 and 9 hours.

When does the Prague clock change happen?

Prague moves clocks forward on the last Sunday in March at 02:00 CET, entering CEST (UTC+2). At that point Tokyo goes from 9 hours ahead to 8 hours ahead. The gap returns to +9 on the last Sunday in October at 03:00 CEST when Prague reverts to CET.

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

The overlap between standard business hours (09:00–18:00) is narrow. Tokyo at 16:00–18:00 JST corresponds to Prague at 08:00–10:00 CET (winter) or 09:00–11:00 CEST (summer). That window is the most practical option for a joint call.

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 stands for Central European Time (UTC+1), used in Prague during winter. CEST stands for Central European Summer Time (UTC+2), used from late March to late October. JST is Japan Standard Time (UTC+9), fixed year-round.

Time Difference: Tokyo to Prague

Name: Time Difference: Tokyo to Prague
Availability: InStock
Author: Nham Vu

See the current time in Tokyo (JST, UTC+9) and Prague (CET/CEST, UTC+1/+2) side by side, with the exact hour offset and working-hours overlap — updated every second.

Tokyo, Japan

--:--:--

JST UTC+9

Prague, Czech Republic

--:--:--

CET UTC+1

Current Offset

+9 hours

Tokyo is 9 hours ahead of Prague

Convert Tokyo Time to Prague Time

Based on the current offset — updates automatically

Tokyo (JST)	Prague (CET/CEST)

Meeting Overlap Finder

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

Tokyo (JST)	Prague (CET/CEST)	Status

Summary

See the current time in Tokyo (JST, UTC+9) and Prague (CET/CEST, UTC+1/+2) side by side, with the exact hour offset and working-hours overlap — updated every second.

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/Prague time (CET in winter or CEST in summer).
The UTC offsets of both cities are compared to calculate the exact hour difference.
All three values — Tokyo time, Prague time, and the offset — refresh every second.
When Prague switches between CET and CEST, the displayed offset adjusts automatically between +8 and +9 hours.

Use cases

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

Frequently Asked Questions

Last updated: 2026-07-28 · Reviewed by Nham Vu