JST to PST Converter
Enter a date and a Tokyo time to get the time in Los Angeles, San Francisco or Seattle. The converter knows when the West Coast is on PST and when it is on PDT.
PSTPacific Time
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JST to PST in short
- 1Tokyo is 17 h ahead of PST and 16 h ahead of PDT.
- 2Shortcut: add 7 hours (8 in US summer) and step back one day.
- 3The West Coast is on PDT from the second Sunday in March to the first Sunday in November.
- 4Tokyo mornings fall on the previous afternoon in California.
Japan time to Pacific Time table
| JST time | JST · PST | JST · PDT |
|---|---|---|
| 12:00 AM | 7:00 AM−1 previous day | 8:00 AM−1 previous day |
| 1:00 AM | 8:00 AM−1 previous day | 9:00 AM−1 previous day |
| 2:00 AM | 9:00 AM−1 previous day | 10:00 AM−1 previous day |
| 3:00 AM | 10:00 AM−1 previous day | 11:00 AM−1 previous day |
| 4:00 AM | 11:00 AM−1 previous day | 12:00 PM−1 previous day |
| 5:00 AM | 12:00 PM−1 previous day | 1:00 PM−1 previous day |
| 6:00 AM | 1:00 PM−1 previous day | 2:00 PM−1 previous day |
| 7:00 AM | 2:00 PM−1 previous day | 3:00 PM−1 previous day |
| 8:00 AM | 3:00 PM−1 previous day | 4:00 PM−1 previous day |
| 9:00 AM | 4:00 PM−1 previous day | 5:00 PM−1 previous day |
| 10:00 AM | 5:00 PM−1 previous day | 6:00 PM−1 previous day |
| 11:00 AM | 6:00 PM−1 previous day | 7:00 PM−1 previous day |
| 12:00 PM | 7:00 PM−1 previous day | 8:00 PM−1 previous day |
| 1:00 PM | 8:00 PM−1 previous day | 9:00 PM−1 previous day |
| 2:00 PM | 9:00 PM−1 previous day | 10:00 PM−1 previous day |
| 3:00 PM | 10:00 PM−1 previous day | 11:00 PM−1 previous day |
| 4:00 PM | 11:00 PM−1 previous day | 12:00 AM |
| 5:00 PM | 12:00 AM | 1:00 AM |
| 6:00 PM | 1:00 AM | 2:00 AM |
| 7:00 PM | 2:00 AM | 3:00 AM |
| 8:00 PM | 3:00 AM | 4:00 AM |
| 9:00 PM | 4:00 AM | 5:00 AM |
| 10:00 PM | 5:00 AM | 6:00 AM |
| 11:00 PM | 6:00 AM | 7:00 AM |
Yesterday on the West Coast
Japan and California sit on opposite sides of the date line, so for most of the Tokyo day the US date is one behind. Only from 5:00 PM in Tokyo (4:00 PM during PDT) onward does California reach the same calendar day.
That matters for deadlines. A form that closes at midnight on the 15th in Tokyo closes at 7:00 AM on the 14th in Los Angeles during PST. Always state the date next to the time when you pass on a Japanese deadline.
Clock changes come from the US
Japan Standard Time is UTC+9 throughout the year, maintained by NICT. Pacific Time is UTC−8 in winter and UTC−7 in summer; the switch happens at 2:00 AM local time on the second Sunday of March and the first Sunday of November (US Department of Transportation).
- Jan 1, 2026 – Mar 8, 2026JST UTC+9 · PST UTC−8Difference: −17 h
- Mar 8, 2026 – Nov 1, 2026JST UTC+9 · PDT UTC−7Difference: −16 h
- Nov 1, 2026 – Mar 14, 2027JST UTC+9 · PST UTC−8Difference: −17 h
- Mar 14, 2027 – Nov 7, 2027JST UTC+9 · PDT UTC−7Difference: −16 h
- Nov 7, 2027 – Jan 1, 2028JST UTC+9 · PST UTC−8Difference: −17 h
Offsets in 2026 – 2027, from the IANA time zone data in your browser's engine
Meeting times that work
The usual window is the Tokyo morning, which is the late afternoon of the previous day in California. 9:00 AM in Tokyo is 5:00 PM in Los Angeles during PDT and 4:00 PM during PST, so the West Coast can join before leaving the office.
Seoul shares Tokyo's offset, see KST to PST. The live Seattle and Vancouver clocks show the Pacific side, and JST to EST covers New York.
Watch the November change
When California returns to PST, a recurring meeting fixed at 4:00 PM Pacific moves from 8:00 AM to 9:00 AM in Tokyo.
JST to PST questions
How many hours is Tokyo ahead of Los Angeles?
Tokyo is 17 hours ahead of Los Angeles on PST, from early November to mid-March, and 16 hours ahead on PDT for the rest of the year.
What is 9:00 AM Monday in Tokyo in California?
It is 4:00 PM Sunday on PST and 5:00 PM Sunday on PDT.
What is the easy way to turn JST into PST?
Add 7 hours and go back one day (add 8 hours and go back one day while California is on PDT).
Does Japan switch to summer time?
No. Japan keeps UTC+9 all year, so only the US clock changes affect the gap.
Are Vancouver and Seattle on the same time as Los Angeles?
Seattle is, all year. Vancouver matches them from March to November only: British Columbia has kept UTC−7 since 2026, so in winter it is an hour ahead of Los Angeles and Seattle.