EBDS is a three minute walk from the Matsudo Station (JR Joban line / Chidoya Metro / Shinkeisei subway line).
This is not the fastest route, but it is easy to explain.
Exit out the west exit (nishi-guchi/西口) and walk straight, continue to ground level, keep walking straight away from the station. Turn right at the first set of traffic lights. Stay on the right side of the street. Walk about 200 meters. One door before you reach the next traffic lights you’ll see a set of stairs to a dart bar called Blue Horse (2F) and to Eva Bellydance Studio (3F!)