Tokyo
Vitamin D from the sun in Tokyo
10 months of sun
In Tokyo you can synthesize vitamin D from February to November.
From December to January synthesis isn't possible — this is when a supplement can help.
Tokyo: we'll tell you the days you can make vitamin D.
Loading notifications…Today's sun in Tokyo
Today's sunrise, sunset, golden hour and day length.
Year-round profile in Tokyo
Daily hours with enough sun to synthesize vitamin D across the year.
Seasonal windows
- March: between 09:00 and 15:00, about 9 min for 1000 IU.
- June: between 08:00 and 16:00, about 5 min for 1000 IU.
- September: between 09:00 and 15:00, about 8 min for 1000 IU.
- December: synthesis isn't possible.
Estimated for Fitzpatrick type III skin, arms and face exposed, clear sky.
When to supplement in Tokyo
During the months without solar synthesis, vitamin D comes only from food or a supplement. It is usually taken as D3, often with magnesium — which the body needs to activate it — and vitamin K (as K2), which contributes to the maintenance of normal bones.
More about supplementsSunrise and sunset by month in Tokyo
How sunrise, sunset and day length change over the year.
| Month | Sunrise | Sunset | Day length |
|---|---|---|---|
| 06:51 | 16:50 | 9 h 59 min | |
| 06:31 | 17:21 | 10 h 50 min | |
| 05:55 | 17:47 | 11 h 52 min | |
| 05:10 | 18:13 | 13 h 03 min | |
| 04:36 | 18:39 | 14 h 02 min | |
| 04:25 | 18:58 | 14 h 34 min | |
| 04:36 | 18:57 | 14 h 21 min | |
| 05:01 | 18:30 | 13 h 30 min | |
| 05:25 | 17:46 | 12 h 21 min | |
| 05:50 | 17:03 | 11 h 13 min | |
| 06:20 | 16:33 | 10 h 14 min | |
| 06:45 | 16:30 | 9 h 45 min |
Approximate values for mid-month (the 15th).
Frequently asked questions about vitamin D in Tokyo
- Can I get vitamin D from the sun in winter in Tokyo?
- In Tokyo you can synthesize vitamin D from February to November.
- How many minutes of sun do I need in Tokyo?
- In summer, about 9 minutes with arms and face exposed is enough for 1000 IU (Fitzpatrick type III skin, clear sky).
- What time does the sun rise and set in Tokyo?
- It shifts with the seasons: in June the sun rises around 04:25 and sets around 18:58; in December it rises around 06:45 and sets around 16:30.
- What is the longest day of the year in Tokyo?
- Longest day: June, with about 15 h of daylight. Shortest day: December, with about 10 h.
- When is golden hour in Tokyo?
- It's roughly the last hour before sunset: in June it starts around 18:20 and in December around 15:50.