https://hasanjasim.online/9-pillars-of-light-appear-in-night-sky-above-coastal-japanese-town/
Fish-attracting light pillars
Maashii told Hint-pot that this phenomenon is known in Japan as “Isaribi Kochu”.
According to Japan Today, “Isaribi Kochu” literally means “fish-attracting light pillars”. The article was reporting on a similar “pillar of light” sighting back in 2015.
Japan Today explained that “Isaribi”, literally “fishing fires”, refers to the lights that are placed on fishing boats to attract larger catches. The practice is fairly common in squid fishing.
As temperatures cool overnight, crystals sometimes form in the air above the lit-up fishing boats. If the conditions are just right for the formation of large crystals without any precipitation, the beams can form as light from the boats reflects off the crystals.



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