After installing XAMPP, install WordPress.

WordPress

Download and unzip the file and copy and paste it into XAMPP's htdocs folder with the appropriate name.

Launch phpmyadmin from "admin" of MySQL in the XAMPP control panel

From "Database" or "Create New", change the database name to the same as the WordPress name you used earlier

Select "utf8mb4 _general_ci", then you can create the database with "Create".

By the way, "utf8mb4_general_ci" is a code that recognizes hiragana and katakana as different characters.

There are many weaknesses such as the sushi beer problem, but this is ok for now.

* If you want to know more details, please contact an expert.