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AKST to JST

+18h

AKST

AKSTSOURCE
UTC-08:00☀ DST active
HH12
:
MM00
  
12:00 (24-hr)
12 AM6 AM12 PM6 PM12 AM

JST

JST
UTC+09:00
HH06
:
MM00
  
(next day)06:00 (24-hr)
12 AM6 AM12 PM6 PM12 AM
AKST
JST
12:00 AM
5:00 PM
2:00 AM
7:00 PM
4:00 AM
9:00 PM
6:00 AM
11:00 PM
8:00 AM
1:00 AM+1
10:00 AM
3:00 AM+1
12:00 PM
5:00 AM+1
2:00 PM
7:00 AM+1
4:00 PM
9:00 AM+1
6:00 PM
11:00 AM+1
8:00 PM
1:00 PM+1
10:00 PM
3:00 PM+1

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

AKST and JST on the World Map

The map below highlights the AKST (Alaska Standard Time) and JST (Japan Standard Time) timezone regions across the globe.

AKSTJSTAnchorageFairbanksJuneauSitkaTokyoOsakaYokohamaNagoya
AKST Zone
→
JST Zone

Explore all world timezones interactively →

AKST – Alaska Standard Time

UTC-09:00

Alaska Standard Time (AKST) is the time zone for the state of Alaska, 9 hours behind UTC.

Countries in AKST
United States (Alaska)
Major Cities in AKST
AnchorageFairbanksJuneauSitkaWasilla
Key Facts about AKST
  • •Alaska is the largest US state by area but has only about 730,000 residents.
  • •Anchorage is the most populous city in AKST with about 290,000 people.
  • •The Aleutian Islands use HAST instead of AKST.
Daylight Saving:Yes – switches to AKDT
Learn more about AKST on Wikipedia

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

Time Conversion Guide: AKST to JST

AKST runs on Alaska Standard Time (AKST) at UTC-09:00. JST runs on Japan Standard Time (JST) at UTC+09:00. That puts AKST 18 hours ahead of JST — a difference of +18h at the current offsets.

In practice, when it is 9:00 AM in AKST it is 3:00 AM in JST on the next day. Midnight in AKST is 6:00 PM in JST. Neither zone observes daylight saving time, so the offset between them stays constant all year.

AKST to JST time conversion table

AKST (AKST)JST (JST)Day
12:00 AM6:00 PMsame day
6:00 AM12:00 AMnext day
7:00 AM1:00 AMnext day
8:00 AM2:00 AMnext day
9:00 AM3:00 AMnext day
12:00 PM6:00 AMnext day
3:00 PM9:00 AMnext day
5:00 PM11:00 AMnext day
6:00 PM12:00 PMnext day
9:00 PM3:00 PMnext day

Why people convert AKST to JST time

  • Scheduling a call from AKST to JST: a 10:00 AM start in AKST lands at 4:00 AM in JST the next day, so you can confirm the slot without doing the arithmetic yourself.
  • Handling a +18h gap: AKST and JST have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in JST is 3:00 AM in AKST.
  • Watching a live event or market open: AKST viewers need 3:00 AM in JST to catch a 9:00 AM start there, and 6:00 AM if the event is anchored to AKST.
  • Always state the zone abbreviation, not just the hour. "3:00 PM AKST" is unambiguous; "3 PM" across a +18h gap is not.
  • With a +18h gap there is no shared 9-to-5 window, so alternate the early start: one week AKST takes the early slot, the next week JST does.

About AKST (Alaska Standard Time)

Alaska Standard Time (AKST) is used in nearly all of Alaska. Due to Alaska's vast geographic size, the Aleutian Islands use Hawaii-Aleutian Standard Time instead. During summer months, Alaska switches to Alaska Daylight Time (AKDT, UTC-08:00).

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.

Best time to call between AKST and JST

With a +18h offset there is no overlap inside a normal 9 AM – 5 PM day. JST opens at 9:00 AM JST, which is 3:00 AM in AKST, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

AKST and JST have no shared working hours because of the +18h gap. Teams need to alternate early starts or rely on asynchronous handovers.

AKST is 18 hours ahead of JST (AKST UTC-09:00 → JST UTC+09:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

AKST

☀ Currently in DST

Standard: UTC-09:00 · DST: UTC-08:00

Clocks fall back on Sun, Nov 1, 2026

JST

Does not observe DST

Frequently Asked Questions

What is the time difference between AKST and JST?

AKST (AKST, UTC-09:00) is 18 hours ahead of JST (JST, UTC+09:00). The gap is currently +18h.

How do I convert AKST time to JST time?

Add +18h to AKST local time. For example, 9:00 AM in AKST is 3:00 AM in JST (next day).

What time is it in JST right now?

JST uses JST at UTC+09:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +18h offset from AKST.

What is the best time to call JST from AKST?

There is no shared working-hours window because of the +18h gap. The closest option is 1:00 PM in AKST, which is 7:00 AM in JST.

Which is ahead, AKST or JST?

AKST is 18 hours ahead of JST. When it is 12:00 PM in AKST it is 6:00 AM in JST.

Does daylight saving time affect the AKST–JST difference?

Neither zone observes daylight saving time, so the +18h offset between AKST and JST is fixed all year.

Which other cities share AKST's time zone?

AKST also covers Anchorage, Fairbanks, Juneau, Sitka, Wasilla.

Which countries use AKST, AKST's zone?

AKST is used in United States (Alaska).

Is there a day difference between AKST and JST?

Sometimes. The +18h gap is large enough that 8:00 PM or later in AKST already falls on the next day in JST.

What is the time difference between AKST and JST?

JST is +18h from AKST.

What timezone is AKST in?

AKST operates on its local timezone.

What timezone is JST in?

JST operates on its local timezone.

Which countries use AKST (Alaska Standard Time)?

AKST is used in United States (Alaska).

Does AKST observe daylight saving time?

Yes, AKST switches to AKDT during summer months.

What are some interesting facts about AKST?

Alaska is the largest US state by area but has only about 730,000 residents. Anchorage is the most populous city in AKST with about 290,000 people.

Which cities are in the JST timezone?

Major cities in the JST timezone include Tokyo, Osaka, Yokohama, Nagoya, Sapporo, Kyoto, Kobe, Fukuoka.

What is the UTC offset for JST?

Japan Standard Time (JST) is at UTC+09:00.

What should I know about the JST timezone?

Japan does not observe daylight saving time. Tokyo is the most populous metropolitan area in the world.

When is it midnight in AKST, what time is it in JST?

When it is 12:00 AM (midnight) in AKST (AKST), it is +18h later in JST (JST).