---
license: cc-by-sa-4.0
language:
  - en
  - ja
programming_language:
  - C
  - C++
  - C#
  - Go
  - Java
  - JavaScript
  - Lua
  - PHP
  - Python
  - Ruby
  - Rust
  - Scala
  - TypeScript
library_name: transformers
tags:
  - deberta
  - deberta-v3
  - fill-mask
datasets:
  - wikipedia
  - EleutherAI/pile
  - bigcode/the-stack
  - mc4
metrics:
  - accuracy
mask_token: "[MASK]"
widget:
    - text: "京都大学で自然言語処理を[MASK]する。"
---

# Model Card for Japanese DeBERTa V2 base

## Model description

This is a Japanese DeBERTa V3 base model pre-trained on LLM-jp corpus v1.0.

## How to use

You can use this model for masked language modeling as follows:

```python
from transformers import AutoTokenizer, AutoModelForMaskedLM
tokenizer = AutoTokenizer.from_pretrained('ku-nlp/deberta-v2-base-japanese')
model = AutoModelForMaskedLM.from_pretrained('ku-nlp/deberta-v2-base-japanese')

sentences = [
    "京都大学で自然言語処理を[MASK]する。",
    "I [MASK] NLP at Kyoto University.",
    'int main() { printf("Hello, [MASK]!"); return 0; }',
]
encodings = tokenizer(sentences, return_tensors='pt')
...
```

You can also fine-tune this model on downstream tasks.

## Tokenization

The tokenizer of this model is based on [huggingface/tokenizers](https://github.com/huggingface/tokenizers) Unigram byte-fallback model.
The vocabulary entries were converted from [`llm-jp-tokenizer v2.2 (100k)`](https://github.com/llm-jp/llm-jp-tokenizer/releases/tag/v2.2).
Please refer to [README.md](https://github.com/llm-jp/llm-jp-tokenizer) of `llm-jp/llm-ja-tokenizer` for details on the vocabulary construction procedure.

Note that unlike [ku-nlp/deberta-v2-base-japanese](https://huggingface.co/ku-nlp/deberta-v2-base-japanese), pre-segmentation by a morphological analyzer (e.g., Juman++) is no longer required for this model.

## Training data

We used the [LLM-jp corpus](https://github.com/llm-jp/llm-jp-corpus) v1.0.1 for pre-training.
The corpus consists of the following corpora:

- Japanese
  - Wikipedia (1B tokens)
  - mC4 (129B tokens)
- English
  - Wikipedia (4B tokens)
  - The Pile (126B tokens)
- Code
  - The Stack (10B tokens)

We shuffled the corpora, which has 270B tokens in total, and trained the model for 2 epochs.
Thus, the total number of tokens fed to the model was 540B.

## Training procedure

We slightly modified [the official implementation of DeBERTa V3](https://github.com/microsoft/DeBERTa) and followed the official training procedure.
The modified code is available at [nobu-g/DeBERTa](https://github.com/nobu-g/DeBERTa).

The following hyperparameters were used during pre-training:

- learning_rate: 1e-4
- per_device_train_batch_size: 800
- num_devices: 8
- gradient_accumulation_steps: 3
- total_train_batch_size: 2400
- max_seq_length: 512
- optimizer: Adam with betas=(0.9,0.999) and epsilon=1e-06
- lr_scheduler_type: linear schedule with warmup
- training_steps: 475,000
- warmup_steps: 10,000

## Acknowledgments

This work was supported by Joint Usage/Research Center for Interdisciplinary Large-scale Information Infrastructures (JHPCN) through General Collaboration Project no. jh221004, "Developing a Platform for Constructing and Sharing of Large-Scale Japanese Language Models".
For training models, we used the mdx: a platform for the data-driven future.