Easiness to create the design
(Conclusion) The registered design was easy to create based on prior arts. (Design right owner lost.)
The registered design is composed of two parts (i) to be attached and detached to chopsticks for the purpose of training infants how to use chopsticks, and these two parts give (ii) an integral aesthetic feeling from a linear impression by part A and an inclined impression by part B.
The above (i) and (ii) together give newness and originality as a design, and it was not easily created by a person skilled in the art from the Prior art to the resistered design.
<Writer: Hideki Takaishi (Attorney-at-law licensed in Japan and California)>
https://www.ip.courts.go.jp/app/files/hanrei_en/283/002283.pdf