Konyo AOKI carried a language study research on the Dutch language, and wrote books such as "Japanese Dutch Translation", "Later Collection of Japanese Dutch Translation", "Japanese Dutch Article Translation", and "Brief Introduction to Japanese Dutch Words", etc.
青木昆陽はオランダ語の語学的な研究を行い、『和蘭話訳』『和蘭話訳後集』『和蘭文訳』『和蘭文字略孝』などを書いた。