Vanguard - Senjin

Japanese: 先陣 - せんじん

〘noun〙① A camp set up in front of the main camp. The troops on the front line. The front line. The vanguard. Sakizonae. Sakite. ※Heike (13th century, early) 4: "The vanguard pulled the bridge.〈omitted〉 They shouted that it was a mistake, but the rear guard didn't hear of it."② The first to board. The first to ascend. ※Azuma Kagami - Juei 3rd year (1184), February 1st: "At Sumoto _Ferry in _Owari Province, the _vanguard fought against _each _other , and the vassals and _others fought _in chaos."③ Another name for "gaen (lying smoke)①." ※Edo Hanjo-ki (1832-36), early: "A person who treads on fire to make water boil is a member of the military."

Saki-jin ...jin [vanguard]

〘 noun 〙 A military force stationed in front of the main force. The leading military force. Senjin. ※Bunmeihon Setsuyoshu (Muromachi period) "Sakijin"

Source: The Selected Edition of the Japanese Language Dictionary About the Selected Edition of the Japanese Language Dictionary Information

Japanese:

〘名〙① 本陣の前方に設けた陣。最前線に立つ部隊。前陣。先鋒。さきぞなえ。さきて。※平家（１３Ｃ前）四「先陣が橋をひいたぞ〈略〉あやまちすなと、どよみけれ共、後陣はこれをききつけず」② 一番のり。さきがけ。先登。※吾妻鏡‐寿永三年（1184）二月一日「於_二尾張国墨俣渡_一、依_レ相_二争先陣_一、与_二御家人等_一闘乱之故也」③ 「がえん（臥煙）①」の異称。※江戸繁昌記（1832‐36）初「赤脚（〈注〉すあし）火を踏て水を溌する者は、廝役（〈注〉センジン）なり」