拾得

1. Origins, structure, and basic meaning

• Structure: 拾得 is read as しゅうとく and functions as a noun or with する for finding and picking up another person's lost property.
• Basic usage: Use the active 財布を拾得する for the finder and the passive 拾得された鍵 for the item found.

2. Common pitfalls and similar expressions

• Active and passive forms
  • を marks the wallet that someone finds, while された presents the key from the perspective of the found item.
• Finding and later handling
  • 拾得 is the finding itself; turning the item in or keeping it at reception is a separate action that follows in the examples.