When It’s Noon in Yokohama, Singapore Is at 11:00
Yokohama runs on Japan Standard Time (JST), fixed at UTC+9. Singapore runs on Singapore Standard Time (SST), fixed at UTC+8. The gap never changes. No daylight saving, no summer time, no clock shifts in either city.
Japan last touched DST from 1948 to 1951 under Allied occupation. Public opposition killed it. Singapore has never observed DST. The offset you see today is the offset you get in January, July, or any other month.
What Is the Time Difference Between Yokohama and Singapore?
Always 1 hour. Yokohama is ahead.
When Yokohama hits 09:00 on a Tuesday, Singapore is at 08:00 the same Tuesday. No date-line crossing, no calendar confusion. Subtract one hour from JST, and you have SST.
Yokohama to Singapore Time Conversion Table
| Yokohama (JST) | Singapore (SST) |
|---|---|
| 07:00 | 06:00 |
| 08:00 | 07:00 |
| 09:00 | 08:00 |
| 10:00 | 09:00 |
| 11:00 | 10:00 |
| 12:00 | 11:00 |
| 13:00 | 12:00 |
| 14:00 | 13:00 |
| 15:00 | 14:00 |
| 16:00 | 15:00 |
| 17:00 | 16:00 |
| 18:00 | 17:00 |
| 19:00 | 18:00 |
| 20:00 | 19:00 |
| 21:00 | 20:00 |
| 22:00 | 21:00 |
| 23:00 | 22:00 |
| 00:00 | 23:00 (prev day) |
When Should a Yokohama Scheduler Rethink the 09:00 Call?
A 09:00 start in Yokohama is 08:00 in Singapore. Most Singapore offices open at 09:00. A call booked before 10:00 Yokohama time risks hitting voicemail or a dark office.
The sweet spot for a two-city call is straightforward. Yokohama 10:00 to 17:00 gives you Singapore 09:00 to 16:00. Lunch hours align neatly: Yokohama 12:00 is Singapore 11:00.
The common advice breaks when a third city joins. A Yokohama-based scheduler who defaults to 09:00 gets Singapore at 08:00, which is tight, and London at 01:00 during British Summer Time, which is impossible. The 1-hour gap with Singapore is easy. The gaps with Europe and the Americas are not. Check the full overlap for multi-city calls before sending the invite.