*1:See eg. https://www.taimei-g.com/artist/sugiyama/sugiyama01.htm https://www.soei-g.com/%E6%97%A5%E6%9C%AC%E8%AA%9E/%E5%8F%96%E6%89%B1%E4%BD%9C%E5%AE%B6/%E6%9D%89%E5%B1%B1%E6%83%A3%E4%BA%8C-1/
*2:See eg. HIRATA KENJ「杉山惣二 / '96美神の門 “The Gate of Venus”」https://at-art.jp/japan/tokyo/minato/odaiba/96%E7%BE%8E%E7%A5%9E%E3%81%AE%E9%96%80-the-gate-of-venus/