License:
CC0-1.0
Steward:
Common VoiceTask: ASR
Release Date: 9/15/2025
Format: MP3
Size: 11.80 GB
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A collection of scripted spoken phrases in Japanese.
Restrictions/Special Constraints
You agree that you will not re-host or re-share this dataset
Forbidden Usage
You agree not to attempt to determine the identity of speakers in the Common Voice dataset
Intended Use
This dataset is intended to be used for training and evaluating automatic speech recognition (ASR) models. It may also be used for applications relating to computer-aided language learning (CALL) and language or heritage revitalisation.
ja)This datasheet has been generated automatically, we would love to include more information, if you would like to help out, get in touch!
This datasheet is for version 23.0 of the the Mozilla Common Voice Scripted Speech dataset
for Japanese (ja). The dataset contains 473645 clips representing 610 hours of recorded
speech (223 hours validated) from 5546 speakers.
The dataset includes the following distribution of age and gender.
Self-declared gender information, percentage refers to the number of clips annotated with this gender.
| Gender | Pertentage |
|---|---|
| Undefined | 28.0% |
| Male Masculine | 33.0% |
| Female Feminine | 39.0% |
| Do Not Wish To Say | 1.0% |
Self-declared age information, percentage refers to the number of clips annotated with this age band.
| Age Band | Percentage |
|---|---|
| Undefined | 15.0% |
| Twenties | 55.0% |
| Thirties | 8.0% |
| Teens | 8.0% |
| Fourties | 9.0% |
| Fifties | 4.0% |
| Sixties | 1.0% |
The official data splits for modelling this language are as follows. Of the validated clips, 17.66% are included in the splits.
| Split | Count |
|---|---|
| Train | 15437 |
| Test | 8007 |
| Dev | 8007 |
The text corpus contains 46076 sentences, of which 37288 are validated, 8788 are invalidated and 783 are reported.
There follows a randomly selected sample of five sentences from the corpus.
彼女は、男性と女性の二重の道徳基準というピューリタニズムから解放されたのか?
健康がいかに大事かは、失いかけたときに初めて身に沁みるのかもしれません。
めだか
我々が選挙に行かないのは、どの政治家が総理大臣になっても同じだと思っているからだ。しかし、それは間違っている。我々が諦めてしまって、行動を放棄しているだけに過ぎない。悪行を野放しにしていれば、なにも変わらない。国民が政治を正すことが政治家の意識を変えることになるのだ。
どうしてかくも人は残虐になれるのでしょうか。
| Domain | Count |
|---|---|
| Undefined | 437276 |
| Agriculture Food | 5741 |
| Automotive Transport | 1225 |
| Finance | 1402 |
| Service Retail | 385 |
| General | 16609 |
| Healthcare | 1352 |
| History Law Government | 3306 |
| Language Fundamentals | 2721 |
| Media Entertainment | 4066 |
| Nature Environment | 1750 |
| News Current Affairs | 724 |
| Technology Robotics | 571 |
Each row of a tsv file represents a single audio clip, and contains the following information:
client_id - hashed UUID of a given user
path - relative path of the audio file
text - supposed transcription of the audio
up_votes - number of people who said audio matches the text
down_votes - number of people who said audio does not match text
age - age of the speaker1
gender - gender of the speaker1
accent - accent of the speaker1
segment - if sentence belongs to a custom dataset segment, it will be listed here
This dataset is released under the Creative Commons Zero (CC-0) licence. By downloading this data you agree to not determine the identity of speakers in the dataset.
For a full list of age, gender, and accent options, see the demograpics spec. These will only be reported if the speaker opted in to provide that information. ↩ ↩2 ↩3