Quick Integration Snippets

CSS @import

@import url('https://cdn.jsdelivr.net/npm/@fontsource/fusion-kai-j/400.css');

body {
  font-family: 'Fusion Kai J', sans-serif;
}

NPM Package

npm install @fontsource/fusion-kai-j

HTML <link> tag

<link href="https://cdn.jsdelivr.net/npm/@fontsource/fusion-kai-j/400.css" rel="stylesheet">

Tailwind CSS v3 Config

// Tailwind CSS v3: tailwind.config.js
module.exports = {
  theme: {
    extend: {
      fontFamily: {
        "fusion-kai-j": ["Fusion Kai J","sans-serif"],
      },
    },
  },
};

Tailwind CSS v4 Theme

/* Tailwind CSS v4: add after your font stylesheet imports */
@theme {
  --font-fusion-kai-j: 'Fusion Kai J', sans-serif;
}

About Fusion Kai J

Fusion Kai J is a display typeface published by Fontsource Community. Its listed license is OFL-1.1. It is distributed under the SIL Open Font License. Check the publisher’s license and distribution details before embedding or redistributing files.

Font Weights & Styles

This typeface includes 1 styles. The available weights are: 400.

Installation

Install the available font package for Fusion Kai J:

npm install @fontsource/fusion-kai-j

Load the supported webfont styles and apply the family:

@import url('https://cdn.jsdelivr.net/npm/@fontsource/fusion-kai-j/400.css');

body {
  font-family: 'Fusion Kai J', sans-serif;
}

Recommended Font Pairings

Try these contrasting families with Fusion Kai J. Compare them at the sizes used in your interface, especially body text and code:

Inter (Sans) — Expressive Headline + Neutral Body: Prevents display personality from overwhelming long-form reading.
Satoshi (Sans) — Display Header + Geometric Sans: Sharp, modern visual hierarchy for SaaS products.
JetBrains Mono (Monospace) — Hero Title + Technical Specs: High-impact contrast for engineering launch sites.

Related Tools

Icon Library — Pair Fusion Kai J with vector icons.
Image Resizer — Pad images for social media covers.
JWT Decoder — Inspect client tokens without data leaks.

Fusion Kai J

Styles & Weights Specimen