In the original Japanese message it says AWAやApple Musicなど - so it's AWA, Apple Music and others.
Pretty sure Spotify will be used as well.
Btw. I found a statistic about the use of paid streaming services from a Japanese magazine through Baidu.
The current top service in Japan is indeed amazon, cause it's coming with their Prime service.
Don't know if free accounts are counted in the numbers for services who offer it.
Services like Line Music only offer paid services.
Tho digital share (streaming plus donwloading, it's about half/half right now) only makes 21% compared to 72% physical share in 2017 in Japan, have to had that in mind.
If Spotify really is just used by 200k Japanese like the news reported - well, numbers of users can't be that hight for the other services except amazon Prime as well.