Convert JST to BST
See the current time difference from Japan Standard Time to British Summer Time and use the hourly table to schedule calls and events.
How JST to BST Works
JST is UTC+9 and BST is UTC+1, so BST is 8 hours behind JST. Enter any time to convert it instantly between Japan Standard Time and British Summer Time.
Hour-by-Hour Time Table
Use the visual grid and hour-by-hour table to compare JST and BST across the day. Check overlapping business hours and export selected times to ICS or Google Calendar.
Schedule Meetings Accurately
Find the best meeting times between Japan and the UK with automatic daylight saving adjustments. Time data follows the IANA timezone database for current and historical accuracy.
How to Convert JST to BST
Open the JST to BST converter: Visit https://www.xconvert.com/time-converter/jst-to-bst-converter to load a visual comparison grid with JST and BST ready for side-by-side viewing. This is useful when you are scheduling a call between Japan and the United Kingdom, or lining up support coverage between a Tokyo team and partners working on BST hours in London, Jersey, Guernsey, or the Isle of Man.
Add comparison cities if your schedule involves more regions: Click + Add City and search for cities that commonly connect with Japan and BST-based business hubs, such as London for finance, Manchester for media and operations, or Tokyo if you want to keep a city label alongside the JST row. This helps remote teams compare Japan working hours with BST schedules used across the United Kingdom and Crown Dependencies when planning client calls, vendor meetings, or cross-border project handoffs.
Select the meeting window on the grid: Click Select, then drag across the colored hourly slots on the JST row to highlight a time range in purple; you can move the block by dragging the center or fine-tune it with the left and right handles. For example, dragging from 9:00 JST to 12:00 JST shows the corresponding BST window of 6:00 BST to 9:00 BST, while 15:00 JST aligns with 12:00 BST and 18:00 JST aligns with 15:00 BST, making it easy to see whether a morning session in Japan lands inside a practical UK workday.
Export and share the selected time: Once a range is selected, use the export options for ICS download, Google Calendar, Gmail, Copy to clipboard, or Share link. This is especially helpful when a Tokyo-based manager needs to send a confirmed BST meeting slot to UK colleagues so everyone receives the event in their own local calendar without manually converting 12:00 JST to 9:00 BST or 18:00 JST to 15:00 BST.
Understanding the JST to BST Time Difference
JST is Japan Standard Time, UTC+9, and BST is Bangladesh Standard Time, UTC+6. JST is 3 hours ahead of BST, which means BST is -3 hours behind JST. In practical terms, when it is 9:00 JST, it is 6:00 BST, and when it is 12:00 JST, it is 9:00 BST.
This difference matters most when teams in Japan need to coordinate with schedules using BST. The conversion stays straightforward in the examples used most often for work planning: 15:00 JST = 12:00 BST and 18:00 JST = 15:00 BST, so an afternoon block in Japan maps to late morning or mid-afternoon in BST.
JST does not observe daylight saving time, so Japan stays on the same time standard all year. BST is a standard-time abbreviation, and its DST counterpart is GMT, which means the JST-to-BST difference can change during the parts of the year when DST is in effect; those are the months when users should pay extra attention to the selected date at the top of the converter before confirming a meeting.
JST is used in Japan, while BST is used in Guernsey, Isle of Man, Jersey, and the United Kingdom. That makes this conversion especially relevant for companies coordinating between Tokyo and UK-based finance, consulting, software, gaming, retail, and media teams that often need exact overlap windows rather than rough estimates.
Best Times for Calls and Meetings Between JST and BST
Because JST is 3 hours ahead of BST, the most practical overlap usually appears when Japan is in its late morning or afternoon and BST is in its morning to early afternoon. The clearest examples are 12:00 JST = 9:00 BST, 15:00 JST = 12:00 BST, and 18:00 JST = 15:00 BST, which create a strong meeting band for standard business communication.
For a formal work call, 12:00 JST / 9:00 BST is a useful starting point because it lands at the beginning of a typical BST workday while still fitting comfortably into midday in Japan. This is a common choice for sales check-ins, agency reviews, and daily coordination between Tokyo teams and UK stakeholders who want to meet before the BST calendar fills up.
For broader collaboration sessions, 15:00 JST / 12:00 BST often works well because both sides are fully into their workday. That timing suits product reviews, cross-functional planning, and vendor meetings where participants need enough time before and after the call to handle follow-up tasks.
If the UK side needs more flexibility later in the day, 18:00 JST / 15:00 BST can still be effective. This window is useful for end-of-day reporting from Japan to BST-based colleagues, especially when a team in Japan wants to complete internal work first and then brief partners in the United Kingdom, Jersey, Guernsey, or the Isle of Man.
By contrast, 9:00 JST = 6:00 BST is usually early for standard office meetings on the BST side. It can still work for urgent operations, market-sensitive coordination, or executive travel schedules, but it is less suitable for routine weekly calls unless the BST participants specifically prefer an early start.
Frequently Asked Questions
What is the time difference between JST and BST?
JST is 3 hours ahead of BST, so BST is -3 hours behind JST. A simple way to remember it is that times in Japan move three hours earlier when converted to BST, such as 12:00 JST = 9:00 BST and 18:00 JST = 15:00 BST.
When is 9 AM JST in BST?
9:00 JST = 6:00 BST. This is an exact conversion often used when checking whether an early Japan morning meeting will be practical for BST-based participants, and in many cases it is quite early for a standard workday on the BST side.
When is 12 PM JST in BST?
12:00 JST = 9:00 BST. This is one of the most useful conversion points for business scheduling because it places Japan at midday while BST reaches the start of a normal office morning, making it suitable for regular team calls and client updates.
When is 3 PM JST in BST?
15:00 JST = 12:00 BST. This is a strong overlap point for collaborative meetings because both sides are in active business hours, which is helpful for project reviews, live approvals, and cross-border operations between Japan and BST-based teams.
When is 6 PM JST in BST?
18:00 JST = 15:00 BST. This timing works well when Japan needs a late-day handoff to BST colleagues, allowing UK-based teams to receive updates while still in the middle of their afternoon.
Does the difference between JST and BST change during DST?
JST does not observe DST, so Japan stays on the same time standard throughout the year. BST is a standard-time abbreviation, and its DST counterpart is GMT, so the JST-to-BST difference can change during the months when DST is in effect; that is why selecting the correct date in the converter matters before sending invites.
What is the best meeting time between JST and BST?
The best meeting windows are usually built around the examples 12:00 JST = 9:00 BST, 15:00 JST = 12:00 BST, and 18:00 JST = 15:00 BST. These pairings place both sides inside realistic working hours, with 15:00 JST / 12:00 BST often being the most balanced option for longer discussions.
Which countries use JST and BST?
JST is used in Japan. BST is used in Guernsey, Isle of Man, Jersey, and the United Kingdom, so this converter is especially relevant for anyone coordinating schedules between Japan and those BST-based locations.