I've only seen one, when I was in Tokyo in March. It was a performance of Slouching Toward Hollywood with Kuze Seika. It's a three person play, but even so, her character didn't have as much stage time as the other two. I enjoyed the production, though. Kuze-san was especially cute in one scene where she was questioned about personal relationships and attempted to meld herself into the potted plant in a corner of the office set. :) I wrote up a short review here, if anyone is curious!