10am in Tokyo is 3pm in Hawaii Time on the previous day.

Frequently asked

Quick answers about converting between Tokyo and Hawaii Time. Can't find what you need? Email [email protected].

What is the time difference between Tokyo and Hawaii Time?

Tokyo is 19 hours ahead of Hawaii Time right now. We always show the live, daylight-saving-correct difference, so this figure already accounts for whichever side is observing summer time today.

When it's 10am in Tokyo, what time is it in Hawaii Time?

10am in Tokyo is 3pm in Hawaii Time on the previous day. Both sides are inside the standard 9-to-5 working day, so this is a sociable time for a call in both places. Use the hour-by-hour table above to read any other time across.

What's the best time for a call between Tokyo and Hawaii Time?

9am–12pm in Tokyo lines up with 2pm–5pm in Hawaii Time the previous day — both sides are inside a 9-to-5 working day.

Does this account for daylight saving time?

Yes. We track every clock change in both places, so the abbreviations you see — JST and HST — are the ones actually in effect right now, not a fixed all-year value. When either side changes its clocks, this page updates automatically.

Why is the date sometimes different on each side?

When two places are far enough apart, the same moment can fall on different calendar days. That is why some conversions are marked "previous day" or "next day" — it is the same instant in time, read off two clocks that crossed midnight at different points.