Choose a sort order for lists in Japanese on Mac
You can sort items in the Finder by name. When you choose a language for your Mac, the sort order for names is automatically set. If you include Japanese in your preferred languages, several sort orders are available.
On your Mac, choose Apple menu > System Settings, click General in the sidebar, then click Language & Region on the right. (You may need to scroll down.)
Verify that Japanese is listed below Preferred Languages. If not, you can set up a Japanese input source.
Click the List Sort Order pop-up menu, then choose a sort order:
Japanese: Japanese Industrial Standard sort order.
Japanese (Radical-Stroke Sort Order): Organized by radical sort order, then stroke count.