I am having difficulty envisioning how one shaves the 'other' side of the face with a kamisori. For example, on my throat, the only stroke that works is from the outside of the neck, directly horizontal towards the larnyx. Inside to outside is 'with' the grain, and up or down is across the grain. Outside in is the only across the grain stroke.

How does one get this stroke with a kamisori if only one side goes against the face?