JSFiddle - React, Tailwind, and code Playground

HTML

<section class="Wrapper"> <h1 class="title">Test Title</h1> <div class="honbun"> サンプルテキスト </div></section><section class="Wrapper"> <h1 class="title">Test Title</h1> <div class="honbun"> サンプルテキスト </div></section>

CSS

.Wrapper {
  display: inline-flex;
  box-sizing: border-box;
  flex-direction: column;
  width: 50%;
  border: 1px solid black;
  background-color: purple;
}