The Hirodai Standard 6000 Vocabulary List (HiroTan) was developed by the Institute for Foreign Language Research and Education (FLaRE) at Hiroshima University. This study aimed to analyze the words in HiroTan and evaluate the segmentation of its Standard and Advanced levels. The words in Hirotan were aligned with specific CEFR-J levels, while the English Vocabulary Profile C-level word list (Tono Laboratory, 2019) was used to further analyze HiroTan words not listed in the CEFR-J Wordlist Version 1.6 (Tono Laboratory, 2020). The analysis confirmed the word selection to be appropriate for undergraduate students at Hiroshima University. The study found that 4,341 (72%) of the 6,000 words are included in the CEFR-J or CEFR C-level word list. The words not included in these lists were partially sourced from JACET 8000 (2003), TOEIC, or business-related vocabulary. By linking HiroTan with the CEFR-J and CEFR (C level), this study confirmed that the word selection for HiroTan has been conducted according to consistent standards, and that the levels of the words are appropriate for students at Hiroshima University
Yuka Takahashi (2025) studied this question.