流行

1. Origins, structure, and basic meaning

• Structure: 流行 is read as りゅうこう and is a verbal noun used both for the state 流行している and as the object in 流行を追う.
• Basic usage: It describes something becoming fashionable within a group or a person following trends.

2. Common pitfalls and similar expressions

• Social group
  • The group in which something is popular can be marked with の間で, as in 若者の間で.
• Sentence role
  • 流行している states popularity, while 流行を追う treats the trend as something followed.