JST to PST Converter (Japan Time to Pacific Time)

Mid-January 2026: PST is 17 hours behind JST. Mid-July 2026: PDT is 16 hours behind JST.

Pacific Time, the clock of California, Washington and most of Oregon, trails Japan by 17 hours in winter and 16 hours in summer. Japan Standard Time is fixed at UTC+9; the Pacific zone is UTC−08:00 on PST and UTC−07:00 on PDT. For most of the day in Tokyo, the date in Los Angeles is the day before.

The pair matters for Japanese companies with offices in Silicon Valley or the Seattle area, for gaming and software firms with West Coast partners, and for travelers on the long routes between Tokyo and Los Angeles, San Francisco and Seattle.

How to use this tool

1. Pick a date and time in JST. The date matters when daylight saving time is in force.
2. Read the matching time in PST, with both UTC offsets.
3. Use "Use current time" for now, or the tables below for a quick look.

Formula

PST time = JST time − (JST UTC offset) + (PST UTC offset)

The converter looks up both UTC offsets for the actual instant in the saved IANA time zone rules, so daylight saving changes are included automatically.

Example

Worked with the saved rules:

9:00 AM JST on March 2, 2026 = 4:00 PM PST (previous day)

6:30 PM JST on August 3, 2026 = 2:30 AM PDT

Time difference through the year

The difference depends on the date when either place moves its clocks. These are the offsets on two reference days, from the saved IANA rules:

Clock changes in 2026

Between these dates the difference shifts by the size of the change.

JST to PST time table

Each hour in Japan Standard Time with the matching Pacific Time time in winter and summer (reference days in January and July).

PST to JST time table

Each hour in Pacific Time with the matching Japan Standard Time time in winter and summer (reference days in January and July).

Hours that work in both places

Hours (on the January reference day) that fall between 8:00 AM and 8:00 PM in both JST and PST:

Check the summer column above when one of the places is on daylight saving time.

Japanese morning, California afternoon

Ten o'clock on a Tuesday morning in Tokyo is 5 p.m. on Monday in California in winter and 6 p.m. on Monday in summer. The overlap between a Japanese working day and a Californian one is narrow, so calls usually take place at the very end of the Californian day or the very start of the Japanese day.

A practical rule is that Tokyo owns the early morning and California owns the late afternoon. If the call has to include people in both places, start it early in the Tokyo morning.

Companies with a Pacific Northwest base

Several Japanese firms have US subsidiaries in the Seattle and Redmond area, such as Nintendo of America, and others in the San Francisco Bay Area and Los Angeles County. Staff there often work a Pacific schedule while reporting to Tokyo headquarters, so an end-of-day report sent at 5 p.m. in Redmond in winter lands at 10 a.m. in Tokyo.

When the two regions change season, remember that only California moves. The gap narrows in March and widens again in November, and a recurring meeting that stays fixed in Tokyo time will move by an hour on the Pacific calendar.