Tokyo to Riyadh
-6hTokyo
JSTSOURCERiyadh
ASTGreen rows indicate typical business hours (9 AM - 5 PM)
JST and AST on the World Map
The map below highlights the JST (Japan Standard Time) and AST (Arabia Standard Time) timezone regions across the globe.
JST – Japan Standard Time
UTC+09:00Japan Standard Time (JST) is the time zone for Japan, 9 hours ahead of UTC.
- •Japan does not observe daylight saving time.
- •Tokyo is the most populous metropolitan area in the world.
- •The Tokyo Stock Exchange operates from 9:00 AM to 3:00 PM JST.
- •JST is 14 hours ahead of EST and 9 hours ahead of GMT.
AST – Arabia Standard Time
UTC+03:00Arabia Standard Time (AST, UTC+03:00) is the time zone for Saudi Arabia and the other Gulf states of the Arabian peninsula.
- •None of the Gulf states on Arabia Standard Time observe daylight saving.
- •AST is the same offset as Moscow Standard Time and East Africa Time.
- •Riyadh is one hour ahead of Central European Time in winter.
- •The AST abbreviation is shared with Atlantic Standard Time (UTC-04:00).
About Tokyo
WikipediaTokyo operates on Japan Standard Time (JST), which is 14 hours ahead of New York. As Asia's largest financial hub, Tokyo trading hours are crucial for global markets.
The Tokyo subway system moves approximately 8.7 million passengers daily.
About Riyadh
WikipediaRiyadh operates on Arabia Standard Time (AST), UTC+3. As OPEC's de facto capital and home to Tadawul, Riyadh time impacts global energy markets.
Riyadh is growing rapidly as part of Saudi Vision 2030 modernization.
Comparing Time Zones: Tokyo and Riyadh
Tokyo runs on Japan Standard Time (JST) at UTC+09:00. Riyadh runs on Arabian Standard Time (AST) at UTC+03:00. That puts Tokyo 6 hours behind Riyadh — a difference of -6h at the current offsets.
In practice, when it is 9:00 AM in Tokyo it is 3:00 AM in Riyadh. Midnight in Tokyo is 6:00 PM in Riyadh. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Tokyo to Riyadh time conversion table
| Tokyo (JST) | Riyadh (AST) | Day |
|---|---|---|
| 12:00 AM | 6:00 PM | previous day |
| 6:00 AM | 12:00 AM | same day |
| 7:00 AM | 1:00 AM | same day |
| 8:00 AM | 2:00 AM | same day |
| 9:00 AM | 3:00 AM | same day |
| 12:00 PM | 6:00 AM | same day |
| 3:00 PM | 9:00 AM | same day |
| 5:00 PM | 11:00 AM | same day |
| 6:00 PM | 12:00 PM | same day |
| 9:00 PM | 3:00 PM | same day |
Why people convert Tokyo to Riyadh time
- Scheduling a call from Tokyo to Riyadh: a 10:00 AM start in Tokyo lands at 4:00 AM in Riyadh, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Tokyo and Riyadh are inside the 9-to-5 working day between 3:00 PM and 5:00 PM JST time (9:00 AM–11:00 AM AST). That is roughly 2 hours of usable overlap.
- Coordinating a Tokyo-based team with Riyadh contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.
- Always state the zone abbreviation, not just the hour. "3:00 PM JST" is unambiguous; "3 PM" across a -6h gap is not.
- Block 3:00 PM–5:00 PM JST as the recurring meeting window if you work primarily from Tokyo and need Riyadh colleagues present.
About JST (Japan Standard Time)
Japan Standard Time (JST) is the standard time zone for all of Japan. Japan does not observe daylight saving time. JST is 9 hours ahead of UTC and 14 hours ahead of EST. The Tokyo Stock Exchange, the world's third largest by market capitalization, operates on JST. South Korea uses the same offset (KST) but it is a distinct time zone.
About AST (Arabia Standard Time)
Arabia Standard Time (AST) is fixed at UTC+03:00 all year across Saudi Arabia, Qatar, Kuwait, Bahrain, Iraq and Yemen. None of these countries observes daylight saving time, so the offset never changes. The abbreviation collides with Atlantic Standard Time (UTC-04:00) used in eastern Canada and the Caribbean; this page covers the Arabian peninsula meaning. Arabia Standard Time is the same offset as Moscow Standard Time and East Africa Time, which makes scheduling with Europe straightforward — Riyadh is one hour ahead of Central European Time in winter and level with it during European summer time.
Best time to call between Tokyo and Riyadh
Both Tokyo and Riyadh sit inside the 9 AM – 5 PM working day between 3:00 PM–5:00 PM JST, which is 9:00 AM–11:00 AM AST. That gives roughly 2 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
Tokyo and Riyadh overlap for about 2 hours during the working day — enough for meetings if you avoid the edges of the window.
Tokyo is 6 hours behind Riyadh (JST UTC+09:00 → AST UTC+03:00). The shared working window is 3:00 PM–5:00 PM JST. Remember to re-check around daylight-saving transitions.
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between Tokyo and Riyadh?
Tokyo (JST, UTC+09:00) is 6 hours behind Riyadh (AST, UTC+03:00). The gap is currently -6h.
How do I convert Tokyo time to Riyadh time?
Add -6h to Tokyo local time. For example, 9:00 AM in Tokyo is 3:00 AM in Riyadh.
What time is it in Riyadh right now?
Riyadh uses AST at UTC+03:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -6h offset from Tokyo.
What is the best time to call Riyadh from Tokyo?
Call between 3:00 PM and 5:00 PM JST — that maps to 9:00 AM–11:00 AM AST and keeps both parties inside the working day.
Which is behind, Tokyo or Riyadh?
Tokyo is 6 hours behind Riyadh. When it is 12:00 PM in Tokyo it is 6:00 AM in Riyadh.
Do Tokyo and Riyadh use different time zones?
Tokyo (Japan) uses JST at UTC+09:00, while Riyadh (Saudi Arabia) uses AST at UTC+03:00. The IANA identifiers are Asia/Tokyo and Asia/Riyadh.
Does daylight saving time affect the Tokyo–Riyadh difference?
Neither zone observes daylight saving time, so the -6h offset between Tokyo and Riyadh is fixed all year.
Which other cities share Tokyo's time zone?
JST also covers Tokyo, Osaka, Yokohama, Nagoya, Sapporo, Kyoto, Kobe, Fukuoka and 1 more.
Which countries use JST, Tokyo's zone?
JST is used in Japan.
Is there a day difference between Tokyo and Riyadh?
Not normally. The -6h gap only pushes the date over the previous day.
What is the time difference between Tokyo and Riyadh?
Riyadh is -6h from Tokyo.
What timezone is Tokyo in?
Tokyo operates on Japan Standard Time (JST), which is 14 hours ahead of New York. As Asia's largest financial hub, Tokyo trading hours are crucial for global markets.
What timezone is Riyadh in?
Riyadh operates on Arabia Standard Time (AST), UTC+3. As OPEC's de facto capital and home to Tadawul, Riyadh time impacts global energy markets.
What are the business hours in Tokyo?
Standard business hours in Tokyo are 9:00 AM - 6:00 PM JST.
What are the business hours in Riyadh?
Standard business hours in Riyadh are 8:00 AM - 4:00 PM AST (Sunday-Thursday).
What is the best time to schedule a call between Tokyo and Riyadh?
The best overlap for a call is when both cities are in business hours. Tokyo works 9:00 AM - 6:00 PM JST and Riyadh works 8:00 AM - 4:00 PM AST (Sunday-Thursday) (-6h difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in Tokyo and Riyadh?
Tokyo uses JPY (¥) while Riyadh uses SAR (﷼). Check current exchange rates when planning travel or business between these cities.
How do Tokyo and Riyadh compare in size?
Tokyo has a population of approximately 14 million (metro: 37.4 million), while Riyadh has approximately 7.7 million (metro: 7.7 million).
What are the major landmarks in Tokyo and Riyadh?
Tokyo is known for Tokyo Tower, Shibuya Crossing, Senso-ji Temple. Riyadh is famous for Kingdom Centre, Masmak Fortress, National Museum.
Do Tokyo and Riyadh have stock exchanges?
Yes. Tokyo has the TSE (Tokyo Stock Exchange) and Riyadh has the Tadawul (Saudi Stock Exchange). The -6h time difference affects trading hour overlaps between these exchanges.
Which countries use JST (Japan Standard Time)?
JST is used in Japan.
Does JST observe daylight saving time?
No, JST does not observe daylight saving time and remains at UTC+09:00 year-round.
What are some interesting facts about JST?
Japan does not observe daylight saving time. Tokyo is the most populous metropolitan area in the world.
Which cities are in the AST timezone?
Major cities in the AST timezone include Riyadh, Jeddah, Doha, Kuwait City, Baghdad.
What is the UTC offset for AST?
Arabia Standard Time (AST) is at UTC+03:00.
What should I know about the AST timezone?
None of the Gulf states on Arabia Standard Time observe daylight saving. AST is the same offset as Moscow Standard Time and East Africa Time.
When is it midnight in Tokyo, what time is it in Riyadh?
When it is 12:00 AM (midnight) in Tokyo (JST), it is -6h later in Riyadh (AST).
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