やこう夜行yakouやぎょう夜行yagyou
1.

The act of engaging in activities or moving around during the nighttime hours, often associated with nocturnal behavior or exploration.

2.

A type of train service that operates during the night, typically traveling long distances while passengers sleep.

3.

An occasion or habit of traveling or socializing at night, which may include various forms of entertainment or adventure.

ひゃっきやぎょう百鬼夜行hyakkiyagyouひゃっきやこう百鬼夜行hyakkiyakou
1.

A nighttime procession where a variety of supernatural beings and spirits roam freely, often depicted in folklore and believed to occur during the darkest hours.

2.

A metaphorical expression describing a chaotic situation in which many individuals engage in wrongful or immoral actions without fear of detection, reflecting a state of disorder within a community.

3.

A traditional belief originating from medieval times, signifying the gathering of various apparitions or monsters that parade through the night, invoking fear and mystery among those who witness or hear of it.

やこうせい夜行性yakousei
1.

The characteristic of animals that causes them to remain inactive during the day, resting in shelters, and to be active at night, foraging for food and engaging in other behaviors.

2.

A behavioral trait observed in certain species that leads them to operate primarily in the nighttime hours, taking advantage of darkness for foraging, hunting, or social interactions, in contrast to those that are active during daylight.

Example:

猫は夜行性の動物だ。

やこうれっしゃ夜行列車yakouressha
1.

A train that operates during nighttime hours, designed to transport passengers while they sleep.

2.

A means of long-distance travel that departs in the evening and arrives the following day, allowing travelers to maximize their time.

3.

A type of train service that provides comfortable sleeping accommodations for nocturnal journeys, often connecting major cities.

やこう夜行yakouバスbasu
1.

A long-distance bus service that operates during the night, allowing passengers to travel while they sleep, often featuring reclining seats for comfort.

2.

A transportation option that connects distant cities overnight, typically designed to maximize efficiency by combining travel with rest.

3.

A bus that departs in the evening and arrives at its destination the following morning, catering to travelers looking to save on accommodation costs while on the road.