noun
Refers to an entire family group, lineage, or clan, often with a sense of shared name or tradition.
彼は有名な武家の一門の出身だ。
He comes from a famous samurai clan.
一
We visit the grave to pray for the prosperity of the family.
noun
Used for a group of disciples, adherents, or followers in arts, religion, or academia, such as a school of thought or a religious sect.
彼は茶道の一門を率いている。
He leads a school of tea ceremony.
その一門の教えは多くの人に影響を与えた。
The teachings of that sect influenced many people.
noun
group of related sumo stables
Sumo-specific term for a group of stables (heya) under the same umbrella organization, often sharing a common origin or master.
この一門にはいくつかの相撲部屋が所属している。
Several sumo stables belong to this ichimon.