In his message, Uchimura regarded Iguchi as one of the great philosophers and educators in and outside of Japan, including Socrates, Pestalozzi and Toju NAKAE.
その中で内村は、井口をソクラテス・ペスタロッチ・中江藤樹という内外の偉大な哲人・教育者と並べて評価した。