Japan Standard Time to US Alaska Time
Convert times between Japan Standard Time (JST, UTC+9:00) and US Alaska Time (AKST, UTC-9:00). US Alaska Time is 18 hours behind Japan Standard Time in standard time. During daylight saving time this difference changes to 17 hours.
UTC+9:00→UTC-9:00 / -8:00
Live timezone converterUTC Offset Reference
| Timezone | Abbreviation | Standard offset | DST offset | Country |
|---|---|---|---|---|
| Japan Standard Time | JST | UTC+9:00 | — | Japan |
| US Alaska Time | AKST / AKDT | UTC-9:00 | UTC-8:00 | United States |
* DST offset applies during summer months. Exact transition dates vary by year.
Standard Time Conversion (JST → AKST)
| Japan Standard Time | US Alaska Time |
|---|---|
| 12:00 AM JST | 6:00 AM (prev day) AKST |
| 6:00 AM JST | 12:00 PM (prev day) AKST |
| 9:00 AM JST | 3:00 PM (prev day) AKST |
| 12:00 PM JST | 6:00 PM (prev day) AKST |
| 3:00 PM JST | 9:00 PM (prev day) AKST |
| 6:00 PM JST | 12:00 AM AKST |
| 9:00 PM JST | 3:00 AM AKST |
Summer (DST) Conversion (JST → AKDT)
| Japan Standard Time (summer) | US Alaska Time (summer) |
|---|---|
| 12:00 AM JST | 7:00 AM (prev day) AKDT |
| 6:00 AM JST | 1:00 PM (prev day) AKDT |
| 9:00 AM JST | 4:00 PM (prev day) AKDT |
| 12:00 PM JST | 7:00 PM (prev day) AKDT |
| 3:00 PM JST | 10:00 PM (prev day) AKDT |
| 6:00 PM JST | 1:00 AM AKDT |
| 9:00 PM JST | 4:00 AM AKDT |
Daylight Saving Time (DST) Notes
- US Alaska Time observes DST. Clocks advance 1 hour to AKDT (UTC-8:00) roughly from month 3 to 11.
- The offset difference shifts between 18h (standard) and 17h (DST season). Always verify the current offset using the live converter below.
Frequently Asked Questions
How do I convert JST to AKST?
Add (-18) hours to the JST time to get AKST. For example, 9:00 AM JST = 3:00 PM AKST.
What is the current UTC offset for Japan Standard Time?
Japan Standard Time is always UTC+9:00 (JST) — it does not observe DST.
Is US Alaska Time ahead or behind Japan Standard Time?
US Alaska Time is 18 hours behind Japan Standard Time in standard time.
When is a good time to schedule a meeting between JST and AKST?
A good overlap window is around 9:00 AM JST / 3:00 PM (prev day) AKST, which falls within business hours for both timezones.
Related Timezone Conversions
Japan Standard Time → US Eastern TimeJST / ESTJapan Standard Time → US Central TimeJST / CSTJapan Standard Time → US Mountain TimeJST / MSTJapan Standard Time → US Pacific TimeJST / PSTJapan Standard Time → Hawaii TimeJST / HSTJapan Standard Time → Canada Atlantic TimeJST / ASTJapan Standard Time → China Standard TimeJST / CSTJapan Standard Time → Hong Kong TimeJST / HKT
Need the exact current time?
Use the live ToolsHub timezone converter to see current times, DST status, and schedule across time zones.