As summarized in the following article, there are some issues with full-text search in Japanese in Omeka S with the default settings.
https://nakamura196.hatenablog.com/entry/2022/03/07/083004
In the above article, I introduced “Workaround 2” as a simple solution to this issue.
This time, I created a repository that applies this workaround to “Foundation S,” one of the themes for Omeka S.
https://github.com/nakamura196/foundation-s
I hope this is helpful for those using the “Foundation S” theme who are experiencing issues with Japanese search.