Joomla 5.4.0 & 6.0の新しいリリース
リリース日：2025年10月15日（日本時間）
リリース内容：Joomla 5.4.0 & 6.0 New Release
今回のアップデイトで注目すべき点は、Joomla Core Systemの自動アップデート機能である。この機能は5.4と6.0に搭載されている。今までJoomla Core Systemのアップデートやマイグレーションは手動でしかできなかった。これからは新しいアップデートがリリースされると自動的にアップデートされる。ただ、サーバー環境やホスティング環境で自動アップデートができなくて手動になる場合もある。
What’s new in Joomla 6.0?
Joomla 6 is a new major version. We’re bringing plenty of new features, security and code improvements and increased speed with those improvements. We’ve highlighted a bunch of features below. You can check the list of all merged features on our GitHub changes page.
Automatic Joomla updates
With Joomla 5.1 we introduced TUF secure Joomla updates. With Joomla 5.4 and 6.0 we are now introducing automatic Joomla core updates! Now you can keep your website up to date automatically and securely!
Cassiopeia child template with extended customisation options
Joomla 6 comes with a new cassiopeia child template that has extended color and font options allowing you to define more colors and font-sizes without having to create a custom css file.
Advanced versioning
The versioning has always been database table based. This meant data like custom fields were not included in the versioning. The versioning has now been extended to also include custom fields data in the versioning.
New custom fields
We have 2 new custom fields available in Joomla 6. There is a new “notes” field that lets you add “notes” in between your custom fields or in your article. This can be very useful to add extra instructions between your custom fields to help guide your users. We now also have a “numbers” custom field that lets you display a number with optional currency formatting options.
Backward Compatibility 6 plugin
New in Joomla 5.4 is the 'Behaviour - Backward Compatibility 6' plugin. In Joomla 5.4, the plugin does not perform any actions other than existing and being enabled. This ensures that when the Joomla instance is updated for Joomla 6, it can run immediately with the updated code, and third-party extensions that require the plugin to be enabled in Joomla 6 will not cause the update to fail. Therefore the 'Behaviour - Backward Compatibility 6' plugin makes upgrades from Joomla 5 smoother.
CSS transitions in Atum & Cassiopeia
Both the default frontend template (Cassiopeia) and the backend template (Atum) now are using CSS transitions. This makes navigation between pages feel much more seamless.
Developer features and optimisations
New Date and Datetime fields
There are two new fields added. The date and datetime-local input’s.
TinyMCE 8.0.1
The TinyMCE version has been updated from version 6 to version 8. This version comes with a host of bugfixes and accessibility improvements.
Cache language files
In Joomla 6 we introduce a caching layer for the languageHelper::parseIniFile method. This greatly improves the loading of the language strings.
ダウンロード先：
既存Joomlaユーザーの方
サイト管理画面にログインしてJoomlaシステムの更新アイコンをクリックしてシステムの更新をして下さい。
システムの更新をする前に、必ず、現在のシステムのバックアップ（DBを含む）をして下さい。
新規ユーザーの方
Joomlaじゃぱん(http://www.joomla.jp)で日本語版パッケージがダウンロードできるようになりましたら、そちらから最新システムをダウンロードして下さい。
