Chiba · Japan · 35.86° N · 139.98° E
Solar position in Kashiwa
Sun position, daylight and the best solar panel angle for Kashiwa — computed for 35.86° N, 139.98° E, 24 m above sea level.
The sun right now
Sun in Kashiwa today
Sunday, 25 October 2026 · local time UTC+9
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:29 | sun 18° below horizon |
| Nautical dawn | 04:59 | 12° below |
| Civil dawn | 05:29 | 6° below |
| Sunrise | 05:55 | 104° ESE |
| Golden hour ends | 06:30 | sun 6° up |
| Solar noon | 11:24 | 42.1° high |
| Golden hour starts | 16:17 | sun 6° up |
| Sunset | 16:52 | 256° WSW |
| Civil dusk | 17:18 | 6° below |
| Nautical dusk | 17:48 | 12° below |
| Astronomical dusk | 18:18 | 18° below |
| Day length | 10 h 57 min | |
Sun path diagram for Kashiwa
Where the sun stands in the sky: the centre is straight overhead, the outer ring is the horizon. Numbers mark local clock hours.
- June solstice
- Equinox
- December solstice
- Today
On the June solstice the sun reaches 77.6° at solar noon in Kashiwa; on the December solstice only 30.7°. Sunrise swings from 60° ENE in June to 119° ESE in December — a 59° arc along the horizon.
Sunrise, sunset and sun height by month
Values for the 21st of each month, local clock time including daylight saving time.
| Month | Sunrise | Solar noon | Sunset | Day length | Noon elevation |
|---|---|---|---|---|---|
| January | 06:47 | 11:51 | 16:55 | 10 h 08 min | 34.2° |
| February | 06:20 | 11:53 | 17:27 | 11 h 06 min | 43.6° |
| March | 05:43 | 11:47 | 17:52 | 12 h 09 min | 54.3° |
| April | 05:00 | 11:38 | 18:18 | 13 h 18 min | 66.0° |
| May | 04:30 | 11:36 | 18:43 | 14 h 12 min | 74.3° |
| June | 04:23 | 11:41 | 18:59 | 14 h 36 min | 77.6° |
| July | 04:39 | 11:46 | 18:53 | 14 h 14 min | 74.6° |
| August | 05:03 | 11:43 | 18:23 | 13 h 20 min | 66.3° |
| September | 05:26 | 11:33 | 17:39 | 12 h 12 min | 54.9° |
| October | 05:51 | 11:24 | 16:57 | 11 h 06 min | 43.5° |
| November | 06:21 | 11:25 | 16:29 | 10 h 08 min | 34.3° |
| December | 06:46 | 11:37 | 16:29 | 9 h 43 min | 30.7° |
A year of daylight in Kashiwa
Each column is one day of 2026. Bright: sun above the horizon; soft: civil twilight; line: solar noon. Steps are daylight saving time changes.
Best solar panel angle in Kashiwa
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
34°collects the most energy over a year: 1334 kWh per kWp.
43°gives the most in the darkest month — the one an off-grid system is sized for.
- Yearly energy
- Worst-month energy
| Tilt | kWh/kWp per year | Share of best year | October kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1142 | 86% | 2.45 | 2.2× |
| 15° | 1273 | 95% | 2.85 | 1.6× |
| 30° | 1331 | 100% | 3.10 | 1.4× |
| 34° year-round best | 1334 | 100% | 3.13 | 1.3× |
| 36° = latitude | 1334 | 100% | 3.15 | 1.3× |
| 43° off-grid best | 1321 | 99% | 3.17 | 1.3× |
| 45° | 1315 | 99% | 3.16 | 1.3× |
| 60° | 1224 | 92% | 3.05 | 1.6× |
| 70° | 1126 | 84% | 2.87 | 1.9× |
| 90° | 857 | 64% | 2.31 | 2.7× |
A fixed array in Kashiwa produces the most over a year at 34°. The design month for an off-grid system is October: at 43° it makes 3.17 kWh per kWp a day, 1% more than at 34°, and costs 1% of the yearly total. Why steep panels win winter.
Off-grid solar in Kashiwa at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 34° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 34° | Mean temp. |
|---|---|---|---|---|---|
| January | 2.66 | 4.56 | 4.09 | 3.77 | 2.5 °C |
| February | 3.23 | 4.21 | 3.76 | 3.86 | 3.4 °C |
| March | 4.02 | 4.01 | 3.52 | 4.09 | 6.7 °C |
| April | 4.76 | 3.59 | 3.08 | 4.15 | 11.8 °C |
| May | 5.10 | 3.14 | 2.63 | 3.98 | 16.8 °C |
| June | 4.64 | 2.69 | 2.21 | 3.44 | 20.6 °C |
| July | 4.75 | 2.82 | 2.28 | 3.52 | 24.4 °C |
| August | 4.96 | 3.39 | 2.75 | 3.92 | 25.6 °C |
| September | 3.86 | 3.36 | 2.77 | 3.44 | 22.0 °C |
| October | 3.02 | 3.40 | 2.87 | 3.13 | 16.3 °C |
| November | 2.53 | 3.80 | 3.30 | 3.18 | 10.7 °C |
| December | 2.34 | 4.25 | 3.77 | 3.40 | 5.2 °C |
| Year | 3.83 avg | 3.60 avg | 1126 kWh | 1334 kWh |
Sizing example. To run a 1 kWh-per-day load through June on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 530 Wp of panels at 70°, versus 380 Wp at 34°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Kashiwa
Distance between rows of 2 m long panels (slope length) so that no row shades the next between 10:00 and 14:00 solar time on the winter solstice.
4.3 mrow pitch at 70°
3.8 mrow pitch at 34°
How Kashiwa compares in Japan
Against the other 1,215 places in Japan with climate data, for a fixed array at its best angle.
599thof 1,216 places in Japan for sunshine, shared: 3.83 peak sun hours a day on flat ground.
+4%solar energy a year compared with the average place in Japan: 1,334 against 1,284 kWh per kWp.
+1 mindaylight on the longest day, compared with Tokyo: 14 h 36 min against 14 h 35 min.
34°best year-round tilt here; across Japan it runs from 17° in Miyakojima to 41° in Kushiro.
Of the 1,216 places in Japan, Miyakojima gets the most sun (4.34 peak sun hours a day) and Wakkanai and one other place the least (3.17); Kashiwa ranks joint 599th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 2.21 kWh a day here, against 2.14 kWh on average in Japan. The shortest day lasts 9 h 43 min, −1 min compared with Tokyo.
Solar forecast for Kashiwa, next 48 hours
Expected output of 1 kWp at 70°, computed from the ICON-EU weather model of the Deutscher Wetterdienst (DWD), Europe.
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Questions about the sun in Kashiwa
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Places near Kashiwa
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A free, live card for Kashiwa: where the sun is right now on today's path, a countdown to sunset or sunrise, the daylight change, the moon phase at night and the best panel angle.
Sun positions: NREL Solar Position Algorithm. Climate: NASA POWER monthly climatology (NASA Langley Research Center). Forecast: Deutscher Wetterdienst, ICON-EU (CC BY 4.0), processed. Places: GeoNames (CC BY 4.0). Time zones: IANA. Sources and licences.