縦たて割わり

noun

vertical division; top-to-bottom split; sectioning by vertical lines

Refers to dividing something along vertical lines, whether physically (e.g., cutting a fruit) or organizationally (e.g., rigid departmental silos). Often contrasted with 横割り (horizontal division).

• この会かい社しゃは縦たて割わり組そ織しきで、部ぶ署しょ間かんの連れん携けいが難むずかしい。

  This company has a vertically divided structure, making interdepartmental cooperation difficult.

• スイカを縦たて割わりにして、みんなで食たべた。

  We cut the watermelon lengthwise and shared it.