力士: sumo wrestler

利希也: a male given name

successive series of questions and responses

vicissitudes, the way that the world or a person prospers one day and declines the next

dotting the i's and crossing the t's

You should treasure every encounter, for it will never recur.

strength / power / force

to raise

immature / juvenile / childish / immature person / juvenile person / childish person / amateurish / inexperienced / unprofessional

to pour / order (注文)