Does it handle Daylight Saving Time?

Yes, the tool automatically adjusts for Daylight Saving Time based on the specific date you select, ensuring accurate conversions year-round.

Can I add multiple cities?

Yes, you can add as many cities as you need to the dashboard to compare times across your entire global network simultaneously.

Osaka to Johannesburg

-7h

Osaka

JSTSOURCE

Japan · UTC+09:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Johannesburg

SAST

South Africa · UTC+02:00

HH05

MM00

05:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Osaka

Johannesburg

12:00 AM

5:00 PM-1

2:00 AM

7:00 PM-1

4:00 AM

9:00 PM-1

6:00 AM

11:00 PM-1

8:00 AM

1:00 AM

10:00 AM

3:00 AM

12:00 PM

5:00 AM

2:00 PM

7:00 AM

4:00 PM

9:00 AM

6:00 PM

11:00 AM

8:00 PM

1:00 PM

10:00 PM

3:00 PM

Green rows indicate typical business hours (9 AM - 5 PM)

JST and SAST on the World Map

The map below highlights the JST (Japan Standard Time) and SAST (South Africa Standard Time) timezone regions across the globe.

JST Zone

→

SAST Zone

Explore all world timezones interactively →

JST – Japan Standard Time

UTC+09:00

Japan Standard Time (JST) is the time zone for Japan, 9 hours ahead of UTC.

Countries in JST

Japan

Major Cities in JST

TokyoOsakaYokohamaNagoyaSapporoKyotoKobeFukuokaHiroshima

Key Facts about JST

•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.

Daylight Saving:No – UTC+09:00 year-round

Learn more about JST on Wikipedia

SAST – South Africa Standard Time

UTC+02:00

South Africa Standard Time (SAST) is the time zone for South Africa and neighboring countries, 2 hours ahead of UTC.

Countries in SAST

South AfricaLesothoEswatini

Major Cities in SAST

JohannesburgCape TownDurbanPretoriaPort Elizabeth

Key Facts about SAST

•South Africa does not observe daylight saving time.
•SAST is the same offset as EET and Israel Standard Time.
•The Johannesburg Stock Exchange (JSE) is Africa's largest.

Daylight Saving:No – UTC+02:00 year-round

Learn more about SAST on Wikipedia

About Osaka

Wikipedia

Osaka operates on Japan Standard Time (JST), UTC+9. As Japan's second economic center and a manufacturing hub, Osaka shares business hours with Tokyo.

Population:2.8 million

Metro:19 million

Business Hours:9:00 AM - 6:00 PM JST

Currency:JPY (¥)

Stock Exchange:OSE (Osaka Exchange - derivatives)

Key Landmarks

Osaka CastleDotonboriUniversal Studios JapanShitennoji TempleUmeda Sky Building

Did You Know?

Osaka Castle was originally built in 1583 and has been rebuilt several times.

Learn more about JST timezone →

About Johannesburg

Wikipedia

Johannesburg operates on South Africa Time (SAST), UTC+2. As Africa's largest economy hub and home to the JSE, Johannesburg drives African financial markets.

Population:5.8 million

Metro:10.5 million

Business Hours:8:00 AM - 5:00 PM SAST

Currency:ZAR (R)

Stock Exchange:JSE (Johannesburg Stock Exchange)

Key Landmarks

Apartheid MuseumConstitution HillGold Reef CityMaboneng PrecinctSoweto

Did You Know?

Johannesburg is built on the world's largest gold deposit.

Learn more about SAST timezone →

Everything You Need to Know About Osaka and Johannesburg Time

Osaka runs on Japan Standard Time (JST) at UTC+09:00. Johannesburg runs on South Africa Standard Time (SAST) at UTC+02:00. That puts Osaka 7 hours behind Johannesburg — a difference of -7h at the current offsets.

In practice, when it is 9:00 AM in Osaka it is 2:00 AM in Johannesburg. Midnight in Osaka is 5:00 PM in Johannesburg. Neither zone observes daylight saving time, so the offset between them stays constant all year.

Osaka to Johannesburg time conversion table

Osaka (JST)	Johannesburg (SAST)	Day
12:00 AM	5:00 PM	previous day
6:00 AM	11:00 PM	previous day
7:00 AM	12:00 AM	same day
8:00 AM	1:00 AM	same day
9:00 AM	2:00 AM	same day
12:00 PM	5:00 AM	same day
3:00 PM	8:00 AM	same day
5:00 PM	10:00 AM	same day
6:00 PM	11:00 AM	same day
9:00 PM	2:00 PM	same day

Why people convert Osaka to Johannesburg time

Scheduling a call from Osaka to Johannesburg: a 10:00 AM start in Osaka lands at 3:00 AM in Johannesburg, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Osaka and Johannesburg are inside the 9-to-5 working day between 4:00 PM and 5:00 PM JST time (9:00 AM–10:00 AM SAST). That is roughly 1 hours of usable overlap.
Keeping family and friends in sync: knowing that 8:00 PM in Osaka is 1:00 PM in Johannesburg makes it easy to avoid calling at 3 AM.

Always state the zone abbreviation, not just the hour. "3:00 PM JST" is unambiguous; "3 PM" across a -7h gap is not.
Block 4:00 PM–5:00 PM JST as the recurring meeting window if you work primarily from Osaka and need Johannesburg 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 SAST (South Africa Standard Time)

South Africa Standard Time (SAST) is used in South Africa, Lesotho, and Eswatini. SAST does not observe daylight saving time. Johannesburg and Cape Town are major economic hubs in Africa.

Best time to call between Osaka and Johannesburg

Both Osaka and Johannesburg sit inside the 9 AM – 5 PM working day between 4:00 PM–5:00 PM JST, which is 9:00 AM–10:00 AM SAST. That gives roughly 1 hours of shared time — the safest window for a live call or meeting.

Business hours overlap

Osaka and Johannesburg overlap for only 60 minutes (4:00 PM–5:00 PM JST), so meetings have to be booked precisely.

Osaka is 7 hours behind Johannesburg (JST UTC+09:00 → SAST UTC+02:00). The shared working window is 4:00 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:

⏳

History of Timekeeping

From sundials to atomic clocks - 5000 years of measuring time

🌍

How Time Zones Work

UTC, offsets, and why zones don't follow straight lines

☀️

Daylight Saving Time

DST dates, which countries observe it, and the ongoing debate

Frequently Asked Questions

What is the time difference between Osaka and Johannesburg?

Osaka (JST, UTC+09:00) is 7 hours behind Johannesburg (SAST, UTC+02:00). The gap is currently -7h.

How do I convert Osaka time to Johannesburg time?

Add -7h to Osaka local time. For example, 9:00 AM in Osaka is 2:00 AM in Johannesburg.

What time is it in Johannesburg right now?

Johannesburg uses SAST at UTC+02:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -7h offset from Osaka.

What is the best time to call Johannesburg from Osaka?

Call between 4:00 PM and 5:00 PM JST — that maps to 9:00 AM–10:00 AM SAST and keeps both parties inside the working day.

Which is behind, Osaka or Johannesburg?

Osaka is 7 hours behind Johannesburg. When it is 12:00 PM in Osaka it is 5:00 AM in Johannesburg.

Do Osaka and Johannesburg use different time zones?

Osaka (Japan) uses JST at UTC+09:00, while Johannesburg (South Africa) uses SAST at UTC+02:00. The IANA identifiers are Asia/Tokyo and Africa/Johannesburg.

Does daylight saving time affect the Osaka–Johannesburg difference?

Neither zone observes daylight saving time, so the -7h offset between Osaka and Johannesburg is fixed all year.

Which other cities share Osaka's time zone?

JST also covers Tokyo, Osaka, Yokohama, Nagoya, Sapporo, Kyoto, Kobe, Fukuoka and 1 more.

Which countries use JST, Osaka's zone?

JST is used in Japan.

Is there a day difference between Osaka and Johannesburg?

Not normally. The -7h gap only pushes the date over the previous day.

What is the time difference between Osaka and Johannesburg?

Johannesburg is -7h from Osaka.

What timezone is Osaka in?

Osaka operates on Japan Standard Time (JST), UTC+9. As Japan's second economic center and a manufacturing hub, Osaka shares business hours with Tokyo.

What timezone is Johannesburg in?

Johannesburg operates on South Africa Time (SAST), UTC+2. As Africa's largest economy hub and home to the JSE, Johannesburg drives African financial markets.

What are the business hours in Osaka?

Standard business hours in Osaka are 9:00 AM - 6:00 PM JST.

What are the business hours in Johannesburg?

Standard business hours in Johannesburg are 8:00 AM - 5:00 PM SAST.

What is the best time to schedule a call between Osaka and Johannesburg?

The best overlap for a call is when both cities are in business hours. Osaka works 9:00 AM - 6:00 PM JST and Johannesburg works 8:00 AM - 5:00 PM SAST (-7h difference). Try scheduling during the overlapping window for maximum convenience.

What currencies are used in Osaka and Johannesburg?

Osaka uses JPY (¥) while Johannesburg uses ZAR (R). Check current exchange rates when planning travel or business between these cities.

How do Osaka and Johannesburg compare in size?

Osaka has a population of approximately 2.8 million (metro: 19 million), while Johannesburg has approximately 5.8 million (metro: 10.5 million).

What are the major landmarks in Osaka and Johannesburg?

Osaka is known for Osaka Castle, Dotonbori, Universal Studios Japan. Johannesburg is famous for Apartheid Museum, Constitution Hill, Gold Reef City.

Do Osaka and Johannesburg have stock exchanges?

Yes. Osaka has the OSE (Osaka Exchange - derivatives) and Johannesburg has the JSE (Johannesburg Stock Exchange). The -7h time difference affects trading hour overlaps between these exchanges.