当該

1. Origins, structure, and basic meaning

• Structure: 当該（とうがい） refers to the particular subject currently being discussed.
• Basic usage: It comes before a noun to identify a specific item, as in 当該商品 or 当該ページ.

2. Common pitfalls and similar expressions

• A formal reference
  • More formal than everyday その, it suits notices, instructions, and business documents referring to an item already identified in context.
• Identifying an item versus meeting a condition
  • 当該 identifies the item in question, while 該当する means meeting a condition or fitting a category.