On April 1, 2021, the JPO has established a means of telephone communication to enable applicants to communicate smoothly with the examiner in charge who works from home.
If you contact the JPO by phone, an examiner will contact you back.
For more information, including the contact person, please check the following URL.
Ministry of Economy, Trade and Industry
https://www.meti.go.jp/press/2021/04/20210401001/20210401001.html