Back in Japan, based on "Kaei tsugo", which was a Cantonese-English vocabulary book he had bought in the USA, Yukichi compiled "Zotei Kaei tsugo" by adding the pronunciation to the English words in katakana and the Japanese expressions corresponding to the Cantonese words, and published it.
帰国し、アメリカで購入してきた広東語・英語対訳の単語集である『華英通語』の英語にカタカナで読みを付け、広東語の漢字の横には日本語の訳語を付記した『増訂華英通語』を出版する。