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Contributed by

seiya Shoya Wada
1 model

ouBioBERT-Base, Uncased

Bidirectional Encoder Representations from Transformers for Biomedical Text Mining by Osaka University (ouBioBERT) is a language model based on the BERT-Base (Devlin, et al., 2019) architecture. We pre-trained ouBioBERT on PubMed abstracts from the PubMed baseline ( via our method.

The details of the pre-training procedure can be found in Wada, et al. (2020).


We evaluated the performance of ouBioBERT in terms of the biomedical language understanding evaluation (BLUE) benchmark (Peng, et al., 2019). The numbers are mean (standard deviation) on five different random seeds.

Dataset Task Type Score
MedSTS Sentence similarity 84.9 (0.6)
BIOSSES Sentence similarity 92.3 (0.8)
BC5CDR-disease Named-entity recognition 87.4 (0.1)
BC5CDR-chemical Named-entity recognition 93.7 (0.2)
ShARe/CLEFE Named-entity recognition 80.1 (0.4)
DDI Relation extraction 81.1 (1.5)
ChemProt Relation extraction 75.0 (0.3)
i2b2 2010 Relation extraction 74.0 (0.8)
HoC Document classification 86.4 (0.5)
MedNLI Inference 83.6 (0.7)
Total Macro average of the scores 83.8 (0.3)

Code for Fine-tuning

We made the source code for fine-tuning freely available at our repository.


If you use our work in your research, please kindly cite the following paper:

Author = {Shoya Wada and Toshihiro Takeda and Shiro Manabe and Shozo Konishi and Jun Kamohara and Yasushi Matsumura},
Title = {A pre-training technique to localize medical BERT and enhance BioBERT},
Year = {2020},
Eprint = {arXiv:2005.07202},