Origin

The character 郊 combines two parts to express "outskirts." On the right is a radical meaning "land" or "region" — this tells you the kanji is about a place. On the left, the component 交 serves as a sound hint, suggesting roughly how to pronounce the character (コウ). The original meaning likely developed from the idea of where two areas or boundaries meet — the point where cultivated land transitions into wilder, rural territory at the edge of a settlement. Over time, this evolved into the general sense of suburban or peripheral areas.