There is a pharmacy near Shinjuku (a train station in Tokyo).
Their website is all in Japanese.
Remedies that they sell are listed.
They answer email in English. The email address: firstname.lastname@example.org
The person who gave me the recommendation said that she contacted them and they had her remedy for her ready when she arrived.
It is much better to buy from them because I am a homeopath and I will charge you handling charges but give you only a few pellets from my limited stock of remedies.