HST to JST Time Converter - Live World Clock

Convert time between Hawaii Standard Time (HST) and Japan Standard Time (JST). See current time with live clocks.

United States (HST)

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07:27:46 AM
Thursday, August 20, 2026

Japan (JST)

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02:27:46 AM
Friday, August 21, 2026

Current Time Difference

HST is -19 hours behind JST

What is HST (Hawaii Standard Time)?

Hawaii Standard Time (HST) used in Hawaii, UTC-10:00. No DST observed.

Countries and Regions Using HST

Primary Country:

  • United States
  • States: Hawaii

Key Facts about HST:

  • ✓ No Daylight Saving Time
  • ✓ Major tourism destination
  • ✓ Pacific island timezone
  • ✓ Major Cities: Honolulu, Pearl City, Hilo
  • ✓ UTC Offset: -10:00

What is JST (Japan Standard Time)?

Japan Standard Time (JST) used in Japan, UTC+9:00.

Countries and Regions Using JST

Primary Country:

  • Japan

Also Used By:

  • South Korea

Key Facts about JST:

  • ✓ Third largest economy
  • ✓ Major tech center
  • ✓ No DST observed
  • ✓ Major Cities: Tokyo, Osaka, Yokohama, Nagoya
  • ✓ UTC Offset: +9:00

HST to JST Time Difference

Standard Time Difference:

HST is -19 hours behind

Common Use Cases:

  • • Business meetings between United States and Japan
  • • International collaboration across timezones
  • • Scheduling calls and conferences

Frequently Asked Questions

Which countries are in HST time zone?

United States is the primary country using HST (-10:00).

Which countries are in JST time zone?

Japan is the primary country using JST (+9:00). Other countries include: South Korea.

How many hours is HST ahead of JST?

HST is -19 hours behind JST.

Does United States observe Daylight Saving Time?

No, United States does not observe Daylight Saving Time. HST remains -10:00 throughout the year.