presentation of new wrestlers to the audience
Sumo term for the ceremony where newly promoted wrestlers are introduced to the crowd, typically before a tournament day's matches.
At the presentation of new wrestlers, the new apprentices step onto the ring and are introduced to the audience.
出世披露 is a more general term for a wrestler's debut or promotion announcement, while 新序出世披露 specifically refers to the initial presentation of new recruits at the very bottom rank.
Compound of 新序 (shinjo, 'new order/rank'), 出世 (shusse, 'promotion'), and 披露 (hirō, 'announcement/presentation'). The term is specific to sumo culture.