If you need some medicines on your trip,
you will visit to the drugstore/pharmacy.
Some foreigner said they can not found
the drugstore/pharmacy in Japan.
Please you find a sing,
this Kanji(Chinese characters)
You can also buy cosmetics and candy,
as well as medicine.
Famous drug chain 3
- Daikokudrug https://daikokudrug.com/
- Higuch https://www.ph-higuchi.co.jp/index.html
- Matsumoto Kiyoshi
Japanese name of each medicine.
Just for reference.
I will introduce what I usually take it.
Stomach medicine = 胃薬（igushuri )
Headache medicine = 頭痛薬（Zutu-yaku）