---
language: ja
tags:
- t5
- text2text-generation
- seq2seq
license: apache-2.0
datasets:
- mc4
- wiki40b
---

# t5-base-japanese-web (with Byte-fallback)

## Description

[megagonlabs/t5-base-japanese-web](https://huggingface.co/megagonlabs/t5-base-japanese-web) is a T5 (Text-to-Text Transfer Transformer) model pre-trained on Japanese web texts.  

### Corpus

- Japanese in [mC4/3.0.1](https://github.com/allenai/allennlp/discussions/5056)
- [Japanese in wiki40b/1.3.0](https://www.tensorflow.org/datasets/catalog/wiki40b#wiki40bja)

### Tokeniser

SentencePiece trained on Japanese Wikipedia

- Vocabulary size: 32,000
- [Byte-fallback](https://github.com/google/sentencepiece/releases/tag/v0.1.9): Enabled

### Parameters

- T5 model: [models/t5.1.1.base.gin](https://github.com/google-research/text-to-text-transfer-transformer/blob/main/t5/models/gin/models/t5.1.1.base.gin)
- Training steps: 1,000,000

## Documents

- [pretrain of T5 with TPU](docs/mC4_wiki40b.md)

## Links

- Repositories
    - [T5](https://github.com/google-research/text-to-text-transfer-transformer)
    - [mT5](https://github.com/google-research/multilingual-t5)
- Related models
    - [日本語T5事前学習済みモデル (sonoisa/t5-base-japanese)](https://huggingface.co/sonoisa/t5-base-japanese)
    - [日本語T5事前学習済みモデル (sonoisa/t5-base-japanese-mC4-Wikipedia)](https://huggingface.co/sonoisa/t5-base-japanese-mC4-Wikipedia)
- Articles
    - [第7回 T5 によるテキスト生成の検証 (2020年2月26日)](https://www.ogis-ri.co.jp/otc/hiroba/technical/similar-document-search/part7.html)
    - [第8回 続・T5 によるテキスト生成の検証 (2020年4月23日)](https://www.ogis-ri.co.jp/otc/hiroba/technical/similar-document-search/part8.html)
    - [第14回 Hugging Face Transformers で T5 を使ってみる (2021年4月22日)](https://www.ogis-ri.co.jp/otc/hiroba/technical/similar-document-search/part14.html)

## License

Apache License 2.0