---
language:
- ja
license: gpl
size_categories:
- 100K<n<1M
task_categories:
- automatic-speech-recognition
pretty_name: Japanese-Anime-Speech-V2
dataset_info:
  features:
  - name: audio
    dtype:
      audio:
        sampling_rate: 16000
  - name: transcription
    dtype: string
  splits:
  - name: sfw
    num_bytes: 19174765803.112
    num_examples: 271788
  - name: nsfw
    num_bytes: 2864808426.209
    num_examples: 20849
  download_size: 24379492733
  dataset_size: 22039574229.321
tags:
- japanese
- anime
- speech
- 日本語
- audio-text
- asr
- whisper
- voice
configs:
- config_name: default
  data_files:
  - split: sfw
    path: data/sfw-*
  - split: nsfw
    path: data/nsfw-*
---

# Japanese Anime Speech Dataset V2

[**日本語はこちら**](https://huggingface.co/datasets/joujiboi/japanese-anime-speech-v2/blob/main/README_JA.md)

**japanese-anime-speech-v2** is an audio-text dataset designed for training automatic speech recognition models.
The dataset comprises **292,637 audio clips** and their corresponding transcriptions from various visual novels.
This dataset is <b>not</b> an expanded version of <a href="https://huggingface.co/datasets/joujiboi/japanese-anime-speech-v1">japanese-anime-speech-v1</a>.
For that reason, much of the audio from japanese-anime-speech-v1 is **not** included in this dataset.

The goal of this dataset is to increase the accuracy of automatic speech recognition models, 
such as OpenAI's [Whisper](https://huggingface.co/openai/whisper-large-v2), in accurately transcribing dialogue from anime and other similar Japanese media.
This genre is characterized by unique vocal and linguistic features and speech patterns that diverge from conventional Japanese speech.

<div class="course-tip course-tip-orange bg-gradient-to-br dark:bg-gradient-to-r before:border-orange-500 dark:before:border-orange-800 from-orange-50 dark:from-gray-900 to-white dark:to-gray-950 border border-orange-50 text-orange-700 dark:text-gray-400">
  <p>
    <b>Content Warning:</b> Please be advised that the audio in this dataset is sourced from visual novels and contains content that is not suitable for all audiences.
    <br>
    An effort was made to split sfw and nsfw content. However, this was purely based on defined rules that won't be 100% reliable.
  </p>
</div>

A list of all audio files and transcriptions can be found [**here**](https://huggingface.co/datasets/joujiboi/japanese-anime-speech-v2/blob/main/audio_transcription_list.txt).

# Dataset information

* **292,637** audio-text pairs
* **397.54h hours** of sfw audio (86.8%)
* **52.36h hours** of nsfw audio (13.2%)
* **5.3s** average sfw audio length
* Dataset source: **visual novels**
* Audio format: **mp3 (128kbps)**
* Latest version: **V2 - June 29th 2024** (this means the second version of the japanese-anime-speech-v2)

# Changes from V1

* Significantly increased dataset size from 73,004 to 292,637 audio-text pairs
* Changed audio from mp3 (192kbps) -> **mp3 (128kbps)** for better storage efficiency
* sfw and nsfw are on different splits
* Repeating characters have been normalised (eg.「はーーーーーーい！」 has become 「はーーい！」)
* Removed audio lines containing no dialogue
* Removed low quality audio lines

# Bias and Limitations

This dataset, while valuable for training anime-style Japanese speech recognition, has some inherent biases and limitations.
The audio is primarily sourced from visual novels, leading to a gender bias towards female voices and a domain-specific vocabulary revolving around topics such as love, relationships, and fantasy.
Additionally, the professionally produced nature of the audio results in clear and slow speech, which may not fully reflect real-world speaking patterns.
This version includes NSFW content, which is not suitable for all applications.
No formatting or cleaning of the transcriptions has been performed (e.g. removing duplicate characters), which may affect the quality of some text samples.

# Future Plans

* Continue expanding the dataset to include more sources

# Use & Credit

This dataset is openly available for commercial or non-commercial use. Anyone is welcome to use this dataset as they deem appropriate.
However, the creator assumes no responsibility for the consequences of its use.
While not mandatory, crediting this dataset with a hyperlink in any derivative work would be greatly appreciated.

I hope that by sharing this dataset, we (the open-source community) improve automatic speech recognition for anime content.