The Sun rises at 04:40 and sets at 18:10. These times are essential for planning outdoor activities, photography, or just enjoying nature.

The golden hour is the period of soft, warm light perfect for photography and occurs shortly after sunrise and just before sunset. In Koshimizu, the golden hour starts at 04:22 and ends at 05:19 in the morning and then again at 17:31 in the evening, ending at 18:28.

Civil twilight is the first and last phase of twilight. In the morning, civil dawn begins at 04:10, marking the time when there's enough light for most outdoor activities. In the evening, civil dusk happens at 18:40, right after sunset at 18:10.

Nautical twilight is the period when the Sun is 6-12 degrees below the horizon, commonly used by sailors to navigate at sea. In Koshimizu, nautical dawn starts at 03:34 and nautical dusk occurs at 19:16.

Astronomical twilight occurs when the Sun is 12-18 degrees below the horizon, and the sky is dark enough for astronomers to observe faint celestial objects. Astronomical dawn in Koshimizu starts at 02:55, while astronomical dusk ends at 19:55.

Whether you're looking to enjoy a beautiful sunrise in Koshimizu or planning to photograph during the golden hour or blue hour, it's essential to know these key solar events and their times.