Origin

This character is a Japanese-created kanji (kokuji) that combines the tree radical on the left, which marks it as a type of plant, with components on the right that suggest the specific tree being described. The character was invented to name the horse chestnut tree native to Japan, which is called tochi in Japanese. Rather than being purely pictographic, it appears to be a purposeful construction to give this particular tree its own written symbol, combining the tree indicator with additional strokes that distinguish it from other plant characters.