Compare JST vs PST
See the current JST to PST time difference, DST impact in Pacific Time, and the best hours to schedule meetings across both zones.
How to Find the Time Difference Between JST and PST
Open the JST vs PST converter: Go to https://www.xconvert.com/time-converter/jst-vs-pst to load a comparison grid with Japan Standard Time (JST) and Pacific Standard Time (PST) already lined up on a 24-hour timeline. This page is useful when you are scheduling a call between Tokyo and Los Angeles, planning support coverage for a Japan-based ecommerce team, or checking whether a West Coast colleague will still be online during Japan business hours.
Add relevant comparison cities: Click “+ Add City” and add cities such as Tokyo, Los Angeles, San Francisco, or Vancouver to compare actual business hubs that use these time zones. This is especially useful for industries like gaming, semiconductor manufacturing, cloud infrastructure, media, and cross-Pacific logistics, where teams in Japan often coordinate with companies on the US West Coast.
Drag to select a working time window: Click “Select” to enter selection mode, then drag across the grid on the JST row, for example from 9:00 AM to 11:00 AM JST. That selection shows the matching PST time as 4:00 PM to 6:00 PM PST on the previous day, which immediately tells you that a Tokyo morning meeting lands in late afternoon in California the day before—often workable for product handoffs, but not ideal for end-of-day finance approvals if one side needs same-date processing.
Export and share the selected overlap: After selecting a range, use the export options for ICS download, Google Calendar, Gmail, Copy to clipboard, or Share link. For example, if a Tokyo engineering manager and a Seattle-based vendor agree on a handoff window, exporting an ICS file ensures the event appears in each participant’s local time automatically, while the Share link is useful for sending a confirmed overlap in Slack or email without rewriting the conversion manually.
JST vs PST Offset Explained
JST is 17 hours ahead of PST during the part of the year when the US West Coast is on standard time. Japan Standard Time is fixed at UTC+9 year-round, while Pacific Standard Time is UTC-8, so the exact gap is 17 hours. That means when it is 9:00 AM in Tokyo, it is 4:00 PM in Los Angeles the previous day under PST.
The complication is that much of the US West Coast does not stay on PST all year. In cities such as Los Angeles, San Francisco, Seattle, and Vancouver in nearby Pacific regions that observe similar seasonal behavior, clocks switch to Pacific Daylight Time (PDT), UTC-7, from 2:00 AM local time on the second Sunday in March until 2:00 AM local time on the first Sunday in November. During that daylight saving period, JST is 16 hours ahead instead of 17.
Japan does not observe daylight saving time, so JST stays stable throughout the year. In 2026, for example, the US Pacific time zone changes to daylight time on March 8, 2026, and returns to standard time on November 1, 2026. So from November 1, 2026 to March 8, 2026 in the standard-time season, the JST–PST gap is 17 hours; from March 8, 2026 to November 1, 2026, the practical Tokyo-to-US West Coast difference is usually JST vs PDT at 16 hours.
This difference matters in real scheduling. A 10:00 AM JST customer call with a Tokyo office equals 5:00 PM PST the previous day, which can work for California-based sales or account teams before they log off. But in summer, that same 10:00 AM JST becomes 6:00 PM PDT the previous day, pushing meetings later for West Coast participants and making overlap narrower for teams in software, animation, gaming, and supply-chain operations.
For business-hour planning, the overlap is limited but not impossible. A typical 9:00 AM to 6:00 PM JST workday corresponds to about 4:00 PM to 1:00 AM PST during standard time, meaning the best live collaboration usually happens in Tokyo morning / US West Coast late afternoon. This is why many multinational companies use Tokyo for Asia operations and California for North America operations, then schedule handoffs rather than long same-time meetings.
Frequently Asked Questions
What is the exact time difference between JST and PST?
JST is 17 hours ahead of PST because JST is UTC+9 and PST is UTC-8. If it is 12:00 PM noon in Japan, it is 7:00 PM PST on the previous day on the US West Coast. This previous-day shift is the part that causes the most confusion when booking meetings or flights.
Why does the JST to PST difference sometimes look like 16 hours instead of 17?
The difference changes because Japan does not use daylight saving time, but the US Pacific time zone does. When California and other Pacific areas move to PDT (UTC-7) between the second Sunday in March and the first Sunday in November, Japan becomes 16 hours ahead instead of 17. So many users searching for “JST vs PST” are actually dealing with JST vs PDT for part of the year.
Is Tokyo always in JST all year?
Yes, Tokyo uses Japan Standard Time year-round, with no seasonal clock changes. Japan is one of the major advanced economies that does not currently observe daylight saving time, so cities such as Tokyo, Osaka, Yokohama, Nagoya, and Sapporo remain on UTC+9 in every month. This makes Japanese scheduling stable internally, but international coordination still changes when partner countries shift clocks.
When is the best meeting time between Japan and the US West Coast?
The most practical overlap is usually Tokyo morning and Pacific late afternoon on the previous day. For example, 9:00 AM JST equals 4:00 PM PST or 5:00 PM PDT the previous day, which works reasonably well for engineering handoffs, publishing deadlines, and support escalations. If both teams need full attendance, many companies choose 9:00–11:00 AM JST because it avoids very late-night hours in Japan and still catches the US West Coast before evening ends.
How do I convert 9 AM JST to PST?
To convert 9:00 AM JST to PST, subtract 17 hours, which gives 4:00 PM PST on the previous day. If the US Pacific region is on daylight saving time instead, subtract 16 hours, giving 5:00 PM PDT on the previous day. This is especially important for calendar invites, because the date changes as well as the time.
Is PST the same as Los Angeles time?
Only during the standard-time part of the year. Los Angeles uses PST (UTC-8) in fall and winter, but it uses PDT (UTC-7) from the second Sunday in March to the first Sunday in November. So if you are coordinating with a company in Los Angeles, Santa Monica, San Diego, or San Francisco, you should verify whether the date falls in PST or PDT before confirming the meeting.
Why is JST vs PST important for business operations?
Japan and the US West Coast are linked by major trade, technology, and media flows. Tokyo is a major center for automotive, electronics, finance, gaming, and manufacturing, while California anchors software, entertainment, venture capital, ecommerce, and cloud services. Because the time gap is large and usually crosses into the previous day, teams often use converters like this to plan product launches, customer support shifts, shipment updates, and executive calls without missing same-day deadlines.