declining aristocracy, an elite class of people displaced by changes in society / (specifically) the Japanese upper class brought to ruin after World War II

so-called

斜陽族: a declining upper class / 社用族: expense account users

(slang, dated) one who wines and dines on company expense, one who dissipates an expense account

the setting sun; slanting rays of the evening sun / (figuratively) decline, fading

tribe / family

(taxonomy) a tribe / (chemistry) a group (column in the periodic table)

those who are given desk work, who are left out of the loop, as a form of constructive dismissal.

Han Chinese

Hui people