最さい後こう方ほう

noun which may take the genitive case particle 'no', noun

hindmost; farthest back; outermost

Refers to the very back or rearmost position in a group, line, or formation. Often used in spatial or positional contexts.

• 彼かれは行ぎょう列れつの最さい後こう方ほうに並ならんだ。

  He lined up at the very back of the queue.

• 最さい後こう方ほうの車しゃ両りょうに乗のってください。

  Please board the rearmost car.