The JPO began jurisdiction over international searches and international preliminary examinations in international applications with the Saudi Arabian Intellectual Property General Directorate as the receiving office, effective June 1, 2022.
Currently, the countries and languages under the jurisdiction of the JPO can be confirmed from the following
Japan Patent Office
https://www.jpo.go.jp/system/patent/pct/chosa-shinsa/pct_isa_ipea.html