参入

1. Origins, structure, and basic meaning

• Structure: 参入 is read as さんにゅう and is a noun for entering a market or field as a new participant; it also combines with する as a verb.
• Basic usage: Announcing entry into a market appears in 市場への参入を発表する, while describing a company entering from another industry appears in 市場に参入する.

2. Common pitfalls and similar expressions

• Distinction from 参加
  • 参入 prominently means entering a market or business field, as in 市場に参入する, whereas 参加 broadly means joining an event or group.