Most Onbuhimos on the market today are based on traditional Japanese baby carriers. These carrier do not have a waist band or straps to secure the fabric to the lower part of your body. The shoulder straps are attached to the body panel. When the straps are tightened properly, the panel is pulled up between the wearer and baby making a seat. They are intended to be use for back carriers with babies who can sit upright unassisted.
We have one Onbuhimo in our Washington County Library: