栃の実

1. Origins, structure, and basic meaning

• Structure: 栃の実 (とちのみ) joins horse chestnut tree 栃 with fruit 実 through の to mean a horse chestnut.
• Basic usage: It refers to nuts collected in a forest or processed as an ingredient in rice cakes.

2. Common pitfalls and similar expressions

• The fruit rather than the tree
  • 栃の実 specifically names what the tree produces; food context may refer to it after preparation rather than raw.