This study examines graphic designs in Japan after the World War II (aka WWII) to unveil certain characteristics and dive into the ethical dimensions of preserving them through visual design restoration. The method utilized was a semi-structured interview which was analyzed by a thematic analysis. There were 12 participants, all experts in the field of heritage preservation and poster art of Japanese. This analysis of axiological qualitative data was composed of 3-step coding. The aim is to find out the connection between traditional and Western influences on post-WWII graphic designs of Japan. A noteworthy thing is an ethical consideration throughout the restoration process to have an assessment of the balance between accessibility and authenticity. The results demonstrated a complete outlook of design heritage preservation. This study is fruitful for conservators, educators, designers, and cultural institutions, practically offering them an empirical insight into restoration ethical dimensions.  A blend of tradition and modernity in post-WWII Japanese graphic designs brought about the broader spectrum of cultural heritage restoration through visual design. Hence, applauding and restoring the Japanese post-WWII design legacy in theoretical and practical terms is the greatest contribution of this study.