在庫

1. Origins, structure, and basic meaning

• Structure: 在庫 (ざいこ) is inventory or stock kept for sale or use.
• Basic usage: 倉庫の在庫を数える counts inventory as a whole; 在庫が一冊だけ残る reports one copy left in stock.

2. Common pitfalls and similar expressions

• Inventory total and remaining stock
  • A warehouse count favors inventory, while 一冊だけ expresses the remaining stock of a specific book.