Update README.md

README.md

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+<div align="center">
+  <img src="./images/kokorochat_logo.png" alt="KokoroChat Logo" width="500"/>
+</div>
+
+[![CC BY-NC-ND 4.0](https://img.shields.io/badge/License-CC%20BY--NC--ND%204.0-lightgrey.svg)](https://creativecommons.org/licenses/by-nc-nd/4.0/)
+
+
+
+# KokoroChat: A Japanese Psychological Counseling Dialogue Dataset Collected via Role-Playing by Trained Counselors
+
+**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.
+
+This work has been **accepted to the main conference of ACL 2025**.
+📄 [View Paper (PDF)](https://drive.google.com/file/d/1T6XgvZii8rZ1kKLgOUGqm3BMvqQAvxEM/view?usp=sharing)
+
+
+
+
+## 🌟 Key Features
+
+- 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.
+
+
+## 📊 Dataset Statistics
+
+| 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     |
+
+## 📁 Dataset Structure
+
+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)
+
+👉 See the `kokorochat_dialogues` folder for the complete dataset.
+
+
+## 📄 Citation
+
+If you use this dataset, please cite the following paper:
+
+```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}
+}
+```
+
+## ⚖️ License
+
+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.
+
+[![CC BY-NC-ND 4.0][cc-by-nc-nd-image]][cc-by-nc-nd]
+
+[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