City comparison · time difference and converter
San Diego vs Tokyo time difference and converter
Tokyo is 17 hours ahead of San Diego right now. San Diego sits in United States on Los Angeles; Tokyo sits in Japan on Tokyo. They are roughly 8,989 km apart (5,586 mi), a flight of about 11h 34m. San Diego's metro holds around 3.3 million people; Tokyo's around 37.4 million.
San Diego
Tokyo
Best meeting times today
Open converter →Slot 1
16:00 / 09:00
San Diego / Tokyo
Both inside business hoursSlot 2
09:00 / 02:00
San Diego / Tokyo
Partial overlapSlot 3
10:00 / 03:00
San Diego / Tokyo
Partial overlap24-hour comparison heatmap
Each row is one hour in San Diego. Green rows are inside business hours in both cities; amber means only one side is at their desk; grey rows fall outside business hours in both.
Public holidays in November 2026
Culture Day
Tokyo, Japan · 文化の日
Tue, Nov 3
Veterans Day
San Diego, United States
Wed, Nov 11
Labour Thanksgiving Day
Tokyo, Japan · 勤労感謝の日
Mon, Nov 23
Thanksgiving Day
San Diego, United States
Thu, Nov 26
Travel context
Great-circle distance
8,989 km
(5,586 mi)
Approximate flight
11h 34m
850 km/h cruise + 1h taxi/climb/descent
Jet lag
17h
Roughly 1 day to adjust per timezone crossed
Convert any specific time
The heatmap gives you the shape of the day. If you need to convert one specific hour, say a customer call or a release window, open the converter with both cities already loaded.
Open in converter →Frequently asked questions
Working between San Diego and Tokyo
The difference between San Diego and Tokyo is not really a number, it's a daily rhythm. Tokyo is 17 hours ahead of San Diego on the clock today, but the lived version is that Tokyo is wrapping up the working day while San Diego is still in the morning, and the overlap people actually use is narrow. That gap, more than the raw offset, is what teams have to design around.
In San Diego, the working day picks up earliest in the financial districts- San Diego's downtown core wakes early and breaks for lunch at the usual hour. The mood in Tokyo is its own story: Shibuya's office workers leave around 19:00, often heading to izakayas, then home on the last train. If you are scheduling between the two, the heatmap above marks the rows where both patterns line up.
Daylight saving is the other thing to keep an eye on. United States shifts the clock on the second Sunday of March and the first Sunday of November; Japan either follows its region's DST pattern or stays put all year. When the two changes are weeks apart, the offset between San Diego and Tokyo is one hour off the usual for that stretch, a cliff that catches recurring calendar invites unless your calendar app rebases them automatically. Pin the meeting to a city, not an offset, and the tool handles the rest.
For travellers, the 11h 34m flight is the short version of the story. The longer one is jet lag: roughly one day of adjustment per timezone crossed, which means a trip across the 17-hour gap costs about 17 groggy days on each side. Pilots and cabin crew swear by morning sunlight and an early walk; whatever your routine, the wall-clock numbers above are the source of truth for your first morning in the new city.