Also there are some prayer equipment such as Qibla direction, veil "mukena" and prayer mat "sajadah" in the female room.
Japan is a great country with a long history. Although so far industrial innovation has been the main focus for Japan, from now on, how to bring the cultural heritage that has been under-recognized in the shadow of history and let the tourists from overseas feel "This is what Japan is about - I want to come again" is the target Japan wants to strive for.
There is a long list of Masjids in Japan on Halal In Japan website which also includes all the existing prayer rooms in the country. The list will be updated regularly.