KanjiJLPT N1
Lightning Bug

lightning-bug, firefly

Mnemonic

An insect wearing a glowing crown drifts over the river at dusk — a Lightning Bug. Its tiny crown pulses with soft light, each flash a silent proclamation: 'I am royalty of the summer night.'
Additional thoughts
The crown radical sits atop the insect radical in the kanji, just like the glowing light cap sits on top of a firefly's body. Picture royalty among bugs — the only insect that wears its own luminous crown.
Quick recall
A crown-wearing insect glowing at dusk is a Lightning Bug.

Details

The keyword for 蛍 is lightning bug. This kanji refers to the firefly, the beloved insect known for producing a soft, bioluminescent glow on warm summer nights. In Japanese culture, lightning bugs hold a special place in poetry and seasonal traditions, symbolizing the fleeting beauty of summer evenings. Their gentle light flickering over rivers and fields has long been a subject of admiration and nostalgia.
On'yomi
けい
Kun'yomi
ほたる