Japanese “prohibited” Button on Instagram

What it signals here

bio usage

Placed in bios to signal exclusivity, mystery, or to mark certain info as off-limits ('DMs 🈲' meaning closed DMs, or used as aesthetic filler).

story usage

Added to story polls, question boxes, or text overlays to jokingly forbid certain answers or signal a topic is banned from discussion.

aesthetic usage

Part of the East Asian character aesthetic trend — used purely for visual appeal alongside other kanji-style emojis to create a sleek, mysterious look.

See it elsewhere