Akiyoshi's illusion pages Akiyoshi KITAOKA, Professor, Psychology, Ritsumeikan University, Osaka, Japan studying visual perception, visual illusion, optical illusion, trompe l'oeil, 3D, etc. ORCID Since May 18, 2002; Updated January 1, 2024 Japanese, Serb, Portuguese, Chinese; Illusion calender 2021 This work was partly supported by JSPS KAKENHI Grant Number 21H04426 awarded to Akiyoshi Kitaoka. W