I haven't personally trained with her, but I hear she has great technique. May be worth checking out.
I hear she can be unforgiving at times with weapons-work and will just wack away at your hand, but maybe she is different with beginners
Marianne Shibata Sensei is very sincere and an excellent teacher. Her weapons work is very good. As a teacher she is very experienced and treats people in a very good manner.I have known her for some time when we both studied the art at San Diego Aikikai.