Good morning friends, Atsuko here with some information on where to get PCR testing. List of “medical treatment, examination medical institution” in Kumamoto-shi. https://www.city.kumamoto.jp.e.fm.hp.transer.com/common/UploadFileDsp.aspx?c_id=5&id=26721&sub_id=84&flid=279153 The list is attached on Kumamoto city HP. https://www.city.kumamoto.jp.e.fm.hp.transer.com/hpkiji/pub/detail.aspx?c_id=5&id=26721
If your goal is not only to get a PCR test, but if you suspect that you have been infected with corona and want to deal with it quickly, I would recommend that you call for an appointment and go directly to a medical facility where you can get a PCR test. The public health center seems not to work well now, and if you wait for the public health center to contact you, the response will often be delayed. If you go to a hospital where you can get a PCR test, you will be able to get antipyretic and other medicines immediately.
The phone call to make an appointment will probably be in Japanese. コロナに なった みたいです。 I suspect that you have been infected with corona. PCR うけたいです。 I would like to take a PCR test. よやく できますか？ Can I make an appointment? いつ いけばいいですか？ What time should I go?
This YUBISASHI sheets are also useful. https://www.yubisashi.com/covid19/
Please take good care and be safe!ଘ(੭ˊ꒳ˋ)੭✧