Compare PST vs JST
See the 17-hour difference between PST and JST, understand how DST can affect it, and find practical meeting windows.
How to Find the Time Difference Between PST and JST
Open the PST vs JST converter page: Go to https://www.xconvert.com/time-converter/pst-vs-jst to load a visual comparison between Pacific Time and Japan Standard Time. This page is useful when you are scheduling a product meeting between a California team in Los Angeles or San Francisco and colleagues in Tokyo, Osaka, or Yokohama, where the time gap is large enough to affect same-day coordination.
Add comparison cities relevant to your work: Click “+ Add City” and add cities such as Los Angeles, San Francisco, and Tokyo for West Coast tech coordination, or add Seattle and Osaka if you are planning operations across software, gaming, electronics, or logistics teams. This is especially practical for companies working across the Pacific, including SaaS teams, semiconductor suppliers, e-commerce operators, and firms coordinating shipments through ports in California and Japan.
Drag across the grid to test meeting windows: Use the Select button if needed, then drag across the colored timeline on the PST row to highlight a range such as 9:00 AM to 11:00 AM PST. In standard time, that converts to 2:00 AM to 4:00 AM JST the next day, which immediately shows why a normal California morning is usually not workable for Japan-based teams; if you instead drag 4:00 PM to 6:00 PM PST, you will see 9:00 AM to 11:00 AM JST the next day, a much more realistic handoff window for engineering, customer support, or supplier calls.
Export the selected overlap for your team: After selecting a range, use the export options for ICS download, Google Calendar, Gmail, Copy to clipboard, or Share link. For example, a distributed team can send the ICS file so everyone sees the meeting in local time automatically, use Google Calendar for recurring cross-Pacific standups, paste the converted slot into Gmail for a client email, or share a direct link with a Tokyo partner confirming the exact overlap.
PST vs JST Offset Explained
Japan Standard Time (JST) is 17 hours ahead of Pacific Standard Time (PST). That means when it is 9:00 AM PST, it is 2:00 AM JST the following day. Because Japan is far ahead of the U.S. West Coast, most converted times fall on the next calendar day in Japan, which is one of the most important details when booking calls, flights, release windows, or support handoffs.
The seasonal complication is that PST is only used during standard time, while much of the U.S. West Coast switches to Pacific Daylight Time (PDT, UTC-7) in warmer months. PST is UTC-8 and JST is UTC+9, creating the exact 17-hour difference on this page; however, when Pacific Time observes daylight saving time, the difference becomes 16 hours instead. In the United States, daylight saving time typically begins on the second Sunday in March and ends on the first Sunday in November; for example, in 2025, Pacific Time switches to daylight time on March 9, 2025, and returns to standard time on November 2, 2025.
Japan does not observe daylight saving time at all, so JST remains UTC+9 year-round. This consistency is helpful for businesses dealing with Japanese markets, including automotive manufacturing, gaming, electronics, finance, and international shipping, because only the North American side changes seasonally. If your team works with Tokyo Stock Exchange hours, supplier deadlines in Nagoya, or customer support in Fukuoka, it is important to check whether the U.S. side is currently on PST or PDT, since that changes the overlap by one hour.
A practical way to think about the difference is to use common workday examples. 8:00 AM PST = 1:00 AM JST next day, 12:00 PM PST = 5:00 AM JST next day, and 5:00 PM PST = 10:00 AM JST next day. This is why many U.S.-Japan meetings are scheduled in the late afternoon or evening on the U.S. West Coast, which lands in the morning business hours in Japan, typically around 9:00 AM to 12:00 PM JST.
For remote teams, the overlap is limited but workable if planned carefully. A California engineering team ending its day at 4:00 PM PST can hand off work to a Tokyo team starting at 9:00 AM JST the next day, creating an effective follow-the-sun workflow. This pattern is common in software development, cloud operations, gaming studios, semiconductor manufacturing support, and international customer service where teams want progress to continue across time zones without waiting a full business day.
Frequently Asked Questions
What is the exact time difference between PST and JST?
JST is 17 hours ahead of PST. Since PST = UTC-8 and JST = UTC+9, the difference is calculated as 17 hours. For example, when it is 6:00 PM in PST, it is 11:00 AM the next day in Japan.
Why does the PST to JST time difference sometimes appear as 16 hours instead of 17?
That happens because the U.S. West Coast does not use PST all year. During daylight saving time, Pacific Time changes to PDT (UTC-7), while Japan stays on JST (UTC+9), so the gap narrows from 17 hours to 16 hours. This change usually starts on the second Sunday in March and ends on the first Sunday in November.
Does Japan use daylight saving time?
No, Japan does not observe daylight saving time, so JST remains UTC+9 throughout the entire year. This makes Japanese local time stable for scheduling, but it also means the time difference changes only when the U.S. Pacific zone moves between PST and PDT. If you are coordinating with Tokyo, Kyoto, or Osaka, the Japanese side never shifts seasonally.
What is the best meeting time between California and Japan?
A common workable option is late afternoon in California and the following morning in Japan. For example, 4:00 PM PST corresponds to 9:00 AM JST the next day, which fits standard office hours in Japan and avoids overnight meetings for Tokyo-based teams. This is widely used by software companies, gaming studios, electronics suppliers, and e-commerce teams operating between the U.S. West Coast and Japan.
If it is 9 AM PST, what time is it in Japan?
If it is 9:00 AM PST, it is 2:00 AM JST the next day. This example shows why a normal morning meeting on the U.S. West Coast is usually too early for Japan-based participants. For live collaboration, teams often move the U.S. meeting later into the afternoon so Japan can join during the next business morning.
How do I schedule a call between PST and JST without making a date mistake?
The safest method is to check both the time and the calendar day, because Japan is usually on the next day relative to PST. On the xconvert grid, drag a proposed PST meeting block and verify where it lands on the JST row before exporting it to ICS, Google Calendar, or a shareable link. This is especially useful for contract reviews, release deployments, and supplier calls where being off by one day can cause missed deadlines.
Is Tokyo always the same as JST?
Yes, Tokyo uses Japan Standard Time, so Tokyo time is the same as JST all year. The same applies to major Japanese cities such as Osaka, Yokohama, Nagoya, Sapporo, Fukuoka, and Kyoto, because Japan uses a single national time zone. That makes domestic coordination inside Japan simpler, even though international scheduling with North America still requires care.
When is the easiest overlap for remote teams in PST and JST?
The easiest overlap is usually 4:00 PM to 6:00 PM PST, which becomes 9:00 AM to 11:00 AM JST the next day during standard time. That window supports standups, release handoffs, customer escalations, and supplier updates without forcing Japan into late-night attendance. If the U.S. side is on daylight saving time instead, the same practical overlap shifts by one hour because the gap becomes 16 hours.