| --- |
| license: cc-by-nc-nd-4.0 |
| task_categories: |
| - text-generation |
| - text-classification |
| language: |
| - ja |
| tags: |
| - nlp |
| - dialogue |
| - dialogue-corpus |
| - dialogue-system |
| size_categories: |
| - 100M<n<1B |
| --- |
| <div align="center"> |
| <img src="./kokorochat_logo_.png" alt="KokoroChat Logo" width="500"/> |
| </div> |
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| <!-- [](https://drive.google.com/file/d/1T6XgvZii8rZ1kKLgOUGqm3BMvqQAvxEM/view?usp=sharing) --> |
| [](https://creativecommons.org/licenses/by-nc-nd/4.0/) |
| [](https://huggingface.co/UEC-InabaLab/Llama-3.1-KokoroChat-High) |
| [](https://github.com/UEC-InabaLab/KokoroChat) |
| [](https://aclanthology.org/2025.acl-long.608/) |
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| # KokoroChat: A Japanese Psychological Counseling Dialogue Dataset Collected via Role-Playing by Trained Counselors |
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| **KokoroChat** is the largest human-collected Japanese psychological counseling dialogue dataset to date (as of June 2025). It was created through role-playing between trained counselors and includes rich, long-form dialogues and detailed client feedback on counseling quality. The dataset supports research on empathetic response generation, dialogue evaluation, and mental health-oriented language modeling. |
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| This work has been **accepted to the main conference of ACL 2025**. |
| 📄 [View Paper](https://aclanthology.org/2025.acl-long.608/) |
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| --- |
|
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| ## 🌟 Key Features |
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| - 6,589 dialogues, collected between 2020 and 2024 |
| - Avg. 91.2 utterances per dialogue |
| - 480 trained counselors simulating online text-based counseling sessions |
| - 20-dimension Likert-scale client feedback for every session |
| - Broad topic coverage: mental health, school, family, workplace, romantic issues, etc. |
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| --- |
|
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| ## 📊 Dataset Statistics |
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| | Category | Total | Counselor | Client | |
| |----------------------------|-----------|-----------|-----------| |
| | **# Dialogues** | 6,589 | - | - | |
| | **# Speakers** | 480 | 424 | 463 | |
| | **# Utterances** | 600,939 | 306,495 | 294,444 | |
| | **Avg. utterances/dialogue** | 91.20 | 46.52 | 44.69 | |
| | **Avg. length/utterance** | 28.39 | 35.84 | 20.63 | |
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| --- |
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| ## 📁 Dataset Structure |
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| Each sample contains: |
| - A full counseling dialogue with role labels (counselor / client) and message timestamps |
| - Structured client feedback on 20 dimensions (0–5 Likert scale) |
| - Flags for ethical concern checks (optional) |
| - Predicted topic label (automatically annotated by GPT-4o-mini) |
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| 👉 See the `kokorochat_dialogues` folder for the complete dataset. |
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| --- |
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| ## 🤖 Models Trained on KokoroChat |
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| The following models were fine-tuned on subsets of the KokoroChat dataset with different feedback score ranges: |
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| - [**Llama-3.1-KokoroChat-Low**](https://huggingface.co/UEC-InabaLab/Llama-3.1-KokoroChat-Low): |
| Fine-tuned on **3,870 dialogues** with client feedback scores **< 70** |
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| - [**Llama-3.1-KokoroChat-High**](https://huggingface.co/UEC-InabaLab/Llama-3.1-KokoroChat-High): |
| Fine-tuned on **2,601 dialogues** with scores between **70 and 98** |
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| - [**Llama-3.1-KokoroChat-Full**](https://huggingface.co/UEC-InabaLab/Llama-3.1-KokoroChat-Full): |
| Fine-tuned on **6,471 dialogues** (excluding 118 test samples with score ≥ 99), with scores **≤ 98** |
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| - 🤖 **Score Prediction Model**: |
| - [Llama-3.1-KokoroChat-ScorePrediction](https://huggingface.co/UEC-InabaLab/Llama-3.1-KokoroChat-ScorePrediction): fine-tuned to **predict client feedback scores** based on the full counseling dialogue history. |
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| --- |
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| ## 📄 Citation |
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| If you use this dataset, please cite the following paper: |
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| ```bibtex |
| @inproceedings{qi2025kokorochat, |
| title = {KokoroChat: A Japanese Psychological Counseling Dialogue Dataset Collected via Role-Playing by Trained Counselors}, |
| author = {Zhiyang Qi and Takumasa Kaneko and Keiko Takamizo and Mariko Ukiyo and Michimasa Inaba}, |
| booktitle = {Proceedings of the 63rd Annual Meeting of the Association for Computational Linguistics}, |
| year = {2025}, |
| url = {https://github.com/UEC-InabaLab/KokoroChat} |
| } |
| ``` |
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| --- |
|
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| ## ⚖️ License |
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| KokoroChat is released under the [**Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)**](https://creativecommons.org/licenses/by-nc-nd/4.0/) license. |
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| [![CC BY-NC-ND 4.0][cc-by-nc-nd-image]][cc-by-nc-nd] |
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| [cc-by-nc-nd]: http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| [cc-by-nc-nd-image]: https://licensebuttons.net/l/by-nc-nd/4.0/88x31.png |
| [cc-by-nc-nd-shield]: https://img.shields.io/badge/License-CC%20BY--NC--ND%204.0-lightgrey.svg |
