This is an useful application at times of illness or injury. By downloading this applicaiton "JHG", you can easily find the nearest hospital to where you are by a smartphone in case that you would become sudden sick or unexpectedly get injured in Japan.
You can download the application from here
You can search medical institutions that can accept foreigners around your current location. In addition, for each medical institution, you can check information such as clinical department, presence / absence of emergency response, medical treatment time, available languages etc.
You can search Japanese popular drugstore
※ The language of application is same as that of your phone.
Matsumoto Kiyoshi has more than 1600 stores in Japan and has a good selection of daily necessities, cosmetics, foods.