Sunrise and Sunset times in Koike, Japan 
Koike
Niigata
Time zone: Asia/Tokyo, UTC 9 h.
Latitude: 37.6378, Longitude: 138.9
| Date | Sunrise | Solar Noon | Sunset | Length of day |
|---|---|---|---|---|
| 2025-Jul-01, Tuesday | 04:26:33 | 11:48:16 | 19:09:59 | 14h 43m 26s |
| 2025-Jul-02, Wednesday | 04:27:01 | 11:48:28 | 19:09:54 | 14h 42m 53s |
| 2025-Jul-03, Thursday | 04:27:31 | 11:48:39 | 19:09:47 | 14h 42m 16s |
| 2025-Jul-04, Friday | 04:28:02 | 11:48:50 | 19:09:38 | 14h 41m 36s |
| 2025-Jul-05, Saturday | 04:28:34 | 11:49:00 | 19:09:27 | 14h 40m 53s |
| 2025-Jul-06, Sunday | 04:29:07 | 11:49:10 | 19:09:14 | 14h 40m 7s |
| 2025-Jul-07, Monday | 04:29:41 | 11:49:20 | 19:08:59 | 14h 39m 18s |
| 2025-Jul-08, Tuesday | 04:30:17 | 11:49:30 | 19:08:43 | 14h 38m 26s |
| 2025-Jul-09, Wednesday | 04:30:53 | 11:49:39 | 19:08:24 | 14h 37m 31s |
| 2025-Jul-10, Thursday | 04:31:30 | 11:49:47 | 19:08:04 | 14h 36m 34s |
| 2025-Jul-11, Friday | 04:32:09 | 11:49:56 | 19:07:42 | 14h 35m 33s |
| 2025-Jul-12, Saturday | 04:32:48 | 11:50:03 | 19:07:19 | 14h 34m 31s |
| 2025-Jul-13, Sunday | 04:33:28 | 11:50:11 | 19:06:53 | 14h 33m 25s |
| 2025-Jul-14, Monday | 04:34:09 | 11:50:17 | 19:06:25 | 14h 32m 16s |
| 2025-Jul-15, Tuesday | 04:34:51 | 11:50:24 | 19:05:56 | 14h 31m 5s |
| 2025-Jul-16, Wednesday | 04:35:34 | 11:50:29 | 19:05:25 | 14h 29m 51s |
| 2025-Jul-17, Thursday | 04:36:17 | 11:50:35 | 19:04:53 | 14h 28m 36s |
| 2025-Jul-18, Friday | 04:37:01 | 11:50:40 | 19:04:18 | 14h 27m 17s |
| 2025-Jul-19, Saturday | 04:37:46 | 11:50:44 | 19:03:42 | 14h 25m 56s |
| 2025-Jul-20, Sunday | 04:38:31 | 11:50:47 | 19:03:04 | 14h 24m 33s |
| 2025-Jul-21, Monday | 04:39:17 | 11:50:50 | 19:02:24 | 14h 23m 7s |
| 2025-Jul-22, Tuesday | 04:40:03 | 11:50:53 | 19:01:43 | 14h 21m 40s |
| 2025-Jul-23, Wednesday | 04:40:50 | 11:50:55 | 19:01:00 | 14h 20m 10s |
| 2025-Jul-24, Thursday | 04:41:38 | 11:50:56 | 19:00:15 | 14h 18m 37s |
| 2025-Jul-25, Friday | 04:42:25 | 11:50:57 | 18:59:29 | 14h 17m 4s |
| 2025-Jul-26, Saturday | 04:43:14 | 11:50:57 | 18:58:41 | 14h 15m 27s |
| 2025-Jul-27, Sunday | 04:44:02 | 11:50:57 | 18:57:51 | 14h 13m 49s |
| 2025-Jul-28, Monday | 04:44:51 | 11:50:56 | 18:57:00 | 14h 12m 9s |
| 2025-Jul-29, Tuesday | 04:45:41 | 11:50:54 | 18:56:08 | 14h 10m 27s |
| 2025-Jul-30, Wednesday | 04:46:30 | 11:50:52 | 18:55:14 | 14h 8m 44s |
| 2025-Jul-31, Thursday | 04:47:20 | 11:50:49 | 18:54:18 | 14h 6m 58s |
Koike on Japan map:
Cities in the same time zone Asia/Tokyo
Tokyo (Tōkyō), Osaka (Ōsaka), Yokohama (Kanagawa), Nagoya (Aichi), Fukuoka (Fukuoka), Sapporo (Hokkaidō), Sendai (Miyagi), Hiroshima (Hiroshima), Kyoto (Kyōto), Kobe (Hyōgo), Kawanakajima (Kanagawa), Kitaku (Fukuoka), Hamamatsu (Shizuoka), Naha (Okinawa), Okayama (Okayama), Kumamoto (Kumamoto), Shizuoka (Shizuoka), Utsunomiya (Tochigi), Nagano (Nagano), Hachioji (Tōkyō), Niigata (Niigata), Kagoshima (Kagoshima), Kanazawa (Ishikawa), Otsu (Shiga), Matsuyama (Ehime), Tsu (Mie), Oita (Ōita), Tokushima (Tokushima), Wakayama (Wakayama), Nagasaki (Nagasaki)
Largest Populated Areas in Japan
Tokyo (Tōkyō), Osaka (Ōsaka), Yokohama (Kanagawa), Nagoya (Aichi), Fukuoka (Fukuoka), Sapporo (Hokkaidō), Sendai (Miyagi), Hiroshima (Hiroshima), Kyoto (Kyōto), Kobe (Hyōgo), Kawanakajima (Kanagawa), Kitaku (Fukuoka), Hamamatsu (Shizuoka), Naha (Okinawa), Okayama (Okayama), Kumamoto (Kumamoto), Shizuoka (Shizuoka), Utsunomiya (Tochigi), Nagano (Nagano), Hachioji (Tōkyō), Niigata (Niigata), Kagoshima (Kagoshima), Kanazawa (Ishikawa), Otsu (Shiga), Matsuyama (Ehime), Tsu (Mie), Oita (Ōita), Tokushima (Tokushima), Wakayama (Wakayama), Nagasaki (Nagasaki)
Daylight Hours FAQ: 10 Most Googled Questions Answered
1. What are daylight hours?
Daylight hours refer to the period between sunrise and sunset. This duration changes throughout the year based on season and geographic location.
2. Why are days shorter in winter and longer in summer?
Earth's 23.5° axial tilt causes uneven sunlight distribution. Your hemisphere receives less direct sunlight in winter (shorter days) and more in summer (longer days).
3. When is the longest day of the year?
Northern Hemisphere: June 20-22 (summer solstice).
Southern Hemisphere: December 21-23.
Near polar circles, the sun doesn't set for 24 hours.
4. When is the shortest day of the year?
Northern Hemisphere: December 21-22 (winter solstice).
Southern Hemisphere: June 20-21.
5. How does latitude affect daylight hours?
The closer to poles, the more extreme variations:
- Equator: ~12-hour days year-round
- Polar regions: Midnight sun/polar nights occur
6. Why do New York and Miami have different day lengths?
Miami's lower latitude means:
- Winter days are longer than NY's
- Summer days are slightly shorter
7. When are day and night equal?
During equinoxes:
- Spring: March 20-21
- Fall: September 22-23
How fast do days lengthen/shorten?
Most rapid change near equinoxes: 2-4 minutes daily.
Slowest change near solstices: <1 minute daily.
9. Where can I check daylight hours for my city?
Reliable tools:
- Timeanddate.com
- SunCalc.org
- Photographer's Ephemeris app
10. Does daylight affect health?
Yes. Reduced winter sunlight may cause:
- Seasonal Affective Disorder (SAD)
- Vitamin D deficiency
Solution: Light therapy lamps & midday walks