JST to CST Converter – Convert Japan Time to Central Time

CST is 15 hours behind JST, so to convert mentally, subtract 15 hours to your JST time. For example: 9:00 AM JST = 6:00 PM CST (previous day). Our converter automatically adjusts for Daylight Saving Time so you always get the right result.

CST (Central Standard Time, UTC-6) is 15 hours behind JST (Japan Standard Time, UTC+9) during standard time. For example, 9:00 AM JST = 6:00 PM CST (previous day). During DST periods, this difference changes by 1 hour when one or both zones observe Daylight Saving Time - our converter automatically applies the correct offset for any date you select.

JST is 15 hours behind CST, so standard 9–5 business hours do not overlap. The most practical meeting window is late afternoon/evening in JST (5–7 PM), which falls in the morning in CST - for example, 5:00 PM JST = 2:00 AM CST. Use our meeting planner to find the exact time for your date, especially around DST transitions.

Japan does not observe Daylight Saving Time. JST remains constant year-round, which simplifies conversions.

Major cities in the JST (Japan Standard Time, UTC+9) timezone include: Tokyo, Osaka, Yokohama, Nagoya, Sapporo, Kyoto, Fukuoka. JST is a fixed-offset zone - these cities do not observe Daylight Saving Time.

Major cities in the CST (Central Standard Time, UTC-6) timezone include: Chicago, Dallas, Houston, Minneapolis, Kansas City, New Orleans, Winnipeg. These cities switch to CDT (UTC-5) from the second Sunday in March to the first Sunday in November.

CST is 15 hours behind JST. Because JST and CST are 15 hours apart, there is no standard business-hour overlap - plan for one side to take an early morning or late evening call. Always include both local times in calendar invites (for example, "2:00 PM JST / 11:00 PM CST (previous day) CST"). Double-check around March and November (or March/October for European zones) when DST transitions can shift the offset by 1 hour. For full scheduling guidance, see our international meeting times guide.