Currently, we are building a digital dictionary of Hatoma, a Yaeyama Ryukyuan language, in the TEI Lex-0 format (Romary and Tasovac 2018). The original dictionary was written by Shinichi Kajiku, a native speaker of Hatoma Ryukyuan and a linguist (Kajiku 2020). He spent more than 50 years compiling the dictionary, which was structured in a spreadsheet format by one of the authors in 2019 (Kajiku and Nakagawa 2021). The structured dictionary with audio files for each entry is now available online. We report some elements the dictionary contains and TEI Lex-0 does not assume yet.