He made efforts to compile full-fledged Dutch-Japanese dictionaries and was expected to contribute in the future, but he died young at the age of 43 because of frail health by nature as well as strain.
本格的蘭和辞典の編纂などに力を尽くし、将来の活躍を期待されていたが生まれつきの病弱に加え心労により43歳という若さで逝去する。