I watch foreign dramas to study English.
I am still a beginner, so I often watch Just add Magic, which is a drama for children.
This drama is for children, but it is very interesting even for me as an adult.
The English is easy to understand and subtitles are available in both English and Japanese.
Many of Amazon original dramas can switch subtitles.
It is really a great deal for about 500 yen/month for unlimited viewing.
I will enjoy it and do my best to study English.
