KanjiJLPT N1
Silkworm

Mnemonic

The heavens once chose a single insect to weave divine thread — the silkworm. Gods lowered shimmering light from the heavens into the mouth of this humble insect, and it spun that light into lustrous silk, becoming the most sacred creature on earth.
Additional thoughts
Picture heavens on top, insect on the bottom — divine light pouring down into the bug's body and emerging as silk thread. The vertical stacking mirrors the kanji structure: 天 over 虫.
Quick recall
The heavens gift one insect — the silkworm — with the power to spin divine silk.

Details

The keyword for 蚕 is silkworm. This kanji refers to the domesticated insect (*Bombyx mori*) that produces silk thread from its cocoon. The silkworm has been cultivated in East Asia for thousands of years and holds great cultural and economic significance, as sericulture (silk farming) was a cornerstone of trade and industry. By extension, the kanji is closely associated with the entire process of silk production.
On'yomi
さん、てん
Kun'yomi
かいこ、こ