noun, noun which may take the genitive case particle 'no'
senior member; veteran; old-timer
Refers to a person who has been in a group, organization, or position for a long time. Often contrasted with 新参 (newcomer). Can be used attributively with の.
See also: 新参
彼はこの会社の古参社員だ。
He is a veteran employee of this company.
古参のメンバーが新人を指
The senior members guide the newcomers.
Compound of 古 (old) and 参 (to join, participate), literally 'old participant'.