淫画 is read as いんが (inga) and means lewd pictures.
いんが
inga
まんが
cartoon
どうばんが
copperplate engraving
きかく
planning
くかく
division
けいかく
plan
ろくが
(video) recording
えいが
movie
かいが
painting
はんが
woodcut
ようが
Western painting
ずが
drawing
すいぼくが
India-ink painting