In the "Ukiyoe Shunga o Yomu," he opposes Timon SCREECH's opinion by saying, 'Shunga is not pornography;' however, he was criticized that his definition of pornography was vague.
『浮世絵春画を読む』で、タイモン・スクリーチの説に反論し「春画はポルノグラフィーではない」と主張したが、ポルノグラフィーの定義が曖昧だと批判を受けた。