firefly; lightning bug
Refers to the insect, especially the Japanese firefly (Luciola cruciata). The term 'glowworm' is sometimes used but typically refers to a different family; in Japanese context, it can overlap.
On a summer night, fireflies were glowing near the river.
When I was a child, I used to catch fireflies.
On a summer night, fireflies were glowing by the riverside.
We went out as a family to see the fireflies.
Fireflies are flying over the rice fields.
Genji firefly; Luciola cruciata
firefly watching · firefly catching
Outdated kanji form; included for recognition of older texts.