Inventive step
(Conclusion)
Inventive step is found
In the cited invention, there is no motivation to change the rear door because it is located in a position where it is easy to perform maintenance.
<Writer: Hideki Takaishi (Attorney-at-law licensed in Japan and California)>
https://www.courts.go.jp/ip/eng/assets/ip/eng/chizai_en/chizai_en-pdf-2767.pdf