開催

1. Origins, structure, and basic meaning

• Structure: 開催 is read as かいさい and is a noun and する verb for holding an event, meeting, festival, or similar organized occasion.
• Basic usage: Holding a reading group appears in 読書会を開催する, while postponing the holding of a festival appears in 祭りの開催が延期される.

2. Common pitfalls and similar expressions

• The organizer and the event
  • When a subject holds an event, the event is marked with を; the word also functions as a noun for the holding itself.
• Difference from 開会
  • Unlike the term focused on a meeting or event beginning or being formally opened, this word covers arranging and holding the event as a whole.