主宰

1. Origins, structure, and basic meaning

• Structure: 主宰 (しゅさい) can denote leading an organization or the director who heads it.
• Basic usage: 読書会を主宰している describes a continuing leadership role; 雑誌の主宰が紹介した refers to the person in charge.

2. Common pitfalls and similar expressions

• Verb to lead and noun director
  • Adding している creates the activity; the standalone noun followed by が identifies the responsible person.