“…Many of these researches are related to computer geometry, and aimed to make the mathematical features clear (Lang, 1996;Belcastro & Hull, 1999;Kawasaki, 1991Kawasaki, , 1994. For example, Shimanuki et al proposed an advanced folding design method which can transform 2-dimensional paper sheet, designed creatively with folding lines, into 3-dimensional Origami directly, and visualized the folding procedure explicitly by using the computer animation or computer graphics (Shimanuki & Watanabe, 2002, 2006. Namely, they made it explicit that the folding features among neighboring or related folding lines take an important role to design the structure of target-object, but could not investigate the instructional stepwise procedure for several operations.…”