⚡ JavaScript Libraries in Japan

JavaScript libraries are collections of prewritten code that provide reusable functions and components for building interactive features and handling common client-side tasks in web applications.

Japan is an East Asian country with a population of around 125 million people.

According to our statistics, JavaScript libraries are used on 80.3% of websites from Japan.

Statistics based on 176K+ analyzed websites. About this data

⭐ Most Popular in 2026

The following chart shows the top JavaScript libraries in Japan in 2026, based on market share.

The most popular is jQuery, which dominates the market with an overwhelming 91.8% share.
It is followed by Slick with 22.9% and Swiper with 19.1%.

jQuery 91.8%
Slick 22.9%
Swiper 19.1%
Facebook SDK 14.7%
Polyfill 11.4%
jQuery Easing 10.5%
X for Websites 8.9%
bxSlider 7.1%
Lazysizes 6.7%
jQuery Cookie 6.4%
Lightbox 6.1%
Fancyapps 5%
FlexSlider 4.4%
ImagesLoaded 4.3%
Regenerator 4.2%

🚀 Highlights

Here is a list of the top libraries that are more popular in Japan than worldwide.
Differences between global and country rankings are shown in parentheses.

2. Slick ^(-4)
6. jQuery Easing ^(-12)
7. X for Websites ^(-31)
8. bxSlider ^(-27)
9. Lazysizes ^(-19)
10. jQuery Cookie ^(-19)
11. Lightbox ^(-9)
12. Fancyapps ^(-1)
13. FlexSlider ^(-6)
15. Regenerator ^(-8)

✨ Best JavaScript Libraries

Below is a more detailed list of the top 25 of the 293 JavaScript libraries used on sites from Japan, ranked by their market share.

Rank	Name	Market share
1	jQuery San Francisco, California, United States A fast, small, feature-rich JavaScript library designed to simplify HTML DOM tree traversal and manipulation, event handling, CSS animations, and Ajax. FreeOpen source	91.8%
2	Slick An open-source jQuery carousel library for creating responsive, touch-enabled, and keyboard-accessible content sliders. FreeOpen source	22.9%
3	Swiper Weston, Florida, United States A modern touch slider library for building responsive sliders and carousels with hardware-accelerated transitions. FreeOpen source	19.1%
4	Facebook SDK Menlo Park, California, United States A library that provides client-side tools for Social Plugins, Login, and Graph API calls. Free	14.7%
5	Polyfill An open-source JavaScript library that provides modern web API features to older browsers that do not natively support them. FreeOpen source	11.4%
6	jQuery Easing Wilberfoss, North Yorkshire, United Kingdom A jQuery plugin that adds 10+ advanced easing animations. FreeOpen source	10.5%
7	X for Websites Bastrop, Texas, United States A suite of tools bringing X content and functionality to your webpages and apps, enabling the X audience to share your content, and follow your X accounts.	8.9%
8	bxSlider Chicago, Illinois, United States An open-source responsive jQuery content slider for displaying images, videos, and HTML content as slideshows or carousels. FreeOpen source	7.1%
9	Lazysizes Berlin, Germany A fast lazy loader library for images, iframes, and scripts/widgets. FreeOpen source	6.7%
10	jQuery Cookie A deprecated jQuery plugin for reading, writing and deleting cookies. FreeOpen sourceLegacy	6.4%
11	Lightbox San Francisco, California, United States The original lightbox library used to overlay images on top of the current page. FreeOpen source	6.1%
12	Fancyapps Ogre, Latvia A commercial JavaScript UI component library for creating lightboxes, carousels, and interactive image viewers. €29+	5%
13	FlexSlider San Francisco, California, United States A responsive jQuery slider created by the WooCommerce team and included with WooCommerce. FreeOpen source	4.4%
14	ImagesLoaded Alexandria, Virginia, United States An open-source JavaScript library that detects when images and CSS background images have finished loading, allowing code to run only after loading is complete. FreeOpen source	4.3%
15	Regenerator Menlo Park, California, United States A JavaScript library from Facebook that allows the use of ES6 generators in older browsers. FreeOpen source	4.2%
16	Modernizr San Francisco, California, United States An open-source feature detection library that identifies browser support for HTML, CSS, and JavaScript features and allows websites to adapt accordingly. FreeOpen source	4.2%
17	Web Font Loader San Jose, California, United States A JavaScript library that gives you added control when using linked fonts via @font-face. FreeOpen source	3.7%
18	MediaElement.js Dallas, Texas, United States A free, open-source HTML5 audio and video player that enables playback of MP4, WebM, and MP3 media files as well as streamed content in HLS and MPEG-DASH formats. FreeOpen source	3.6%
19	Wow.js A JavaScript library that reveals CSS animations when you scroll. FreeOpen source	3.4%
20	🍪 JS Cookie Germany An open-source, lightweight JavaScript library for managing browser cookies. FreeOpen source	2.8%
21	React Menlo Park, California, United States A popular open-source JavaScript library for building dynamic user interfaces through reusable and stateful UI components, originally created by Facebook. FreeOpen source	2.8%
22	SmoothScroll Smooth scrolling experience for websites. FreeOpen source	2.7%
23	🏩 Masonry Alexandria, Virginia, United States A JavaScript layout library that produces a Pinterest-style cascading grid where elements are organized in a compact, space-efficient layout. FreeOpen source	2.7%
24	jQuery Colorbox A lightweight, customizable lightbox plugin for jQuery. FreeOpen source	2.6%
25	jQuery Mousewheel A jQuery plugin that adds cross-browser mouse wheel support. FreeOpen sourceLegacy	2.5%

👉 See Also

🌎 JavaScript Libraries in other countries

🗃️ About This Data

We evaluate the popularity of technologies based on the number of websites where we detect their usage.
Technologies without a detectable web footprint, and those we do not track, are not reflected in the calculated market share.
This report is based on the analysis of 176,751 websites from Japan.
We currently track the presence of 312 JavaScript libraries across the web.
Of these, 293 were detected on websites from Japan.
Statistics were last calculated on August 3, 2026.
For more details, see our methodology and disclaimer.