古参|こさんkosan[0]heiban (flat)

1. no-adjectivesenior; veteran; old-timer
   古参こさん議員ぎいんたちは、選挙せんきょで参議院さんぎいんの議席ぎせきを失うしないそうになりました。↗

   The old guard was nearly voted out of the Upper House.

• SynonymベテランNeutralLoanword for a seasoned hand; highlights mastery of the job, while 「古参」 highlights how long one has belonged to the group.
• Synonym古豪こごうWrittenWritten style for an old-established powerhouse with proven strength; common in sports, as in 「古豪復活」.
• Related先輩せんぱいNeutralSomeone senior who joined earlier — the senior-junior bond; 「古参」 simply stresses long tenure.
• Related目上めうえNeutralA person above you in position or age; it is about rank and deference, not years of service.
• Related古強者ふるつわものWrittenWritten, with a samurai flavor: a battle-hardened old soldier or veteran of countless battles.
• Related老巧ろうこうWrittenWritten word meaning seasoned and experienced; describes polished skill rather than long membership.
• Related老手ろうしゅWrittenWritten term for a past master; uncommon — in everyday speech 「ベテラン」 is the natural choice.
• Related老兵ろうへいWrittenWritten; an aged soldier, or one with long experience. Its focus is the army, not years spent in a particular group or workplace.
• Related老練家ろうれんかWrittenWritten and rarely used; a seasoned expert whose forte is refined technique, not length of service.
• Antonym新参しんざんNeutralAntonym: a person newly joined to the group, the opposite of long-serving 「古参」.

Use 「古参」 for someone who has long belonged to a group or workplace, as in 「古参社員」. For proven skill say 「ベテラン」; for the senior-junior relation 「先輩」; for higher rank or age 「目上」. 「古豪」「古強者」「老巧」「老手」「老練家」 are written words centred on strength or skill rather than tenure, and 「老兵」 is a written word for an old soldier. The antonym is 「新参」, a newcomer.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. ある職場しょくばや仲間なかまに、古ふるくからいること。また、その人ひと。