一党

1. Origins, structure, and basic meaning

• Structure: 一党 (いっとう) is a noun for one political party or for a single gang acting together.
• Basic usage: 盗賊の一党が集まる makes a gang of thieves the subject, while 一党だけが多数を占める singles out one parliamentary party holding a majority.

2. Common pitfalls and similar expressions

• Gang and political party
  • 盗賊の一党 denotes a gang, whereas 議会で一党 denotes a political organization. だけ in the second excludes other parties and stresses that only one holds the majority.