Go to
Rosenheimerplatz, get out of the S-Bahn at the front of the train in the outbound direction. Get out at Weißenburger Str. where the theatre is. Facing the theater, you want to go to the right down
Rosenheimerstr. towards Hit/Aldi/Reno and the rest of those stores in an underground mall. Along the street are a couple Asian grocery stores and in the upper (street level) of the "mall" is yet another Asian market. They all have edamame.
To serve edamame properly you need kosher salt which I haven't found here yet. When cooking them, the water needs to be about double the saltiness of seawater (plain old table salt is fine for cooking). These are the two things most places get wrong.
woof.