ja high-quality speech corpus

This dataset contains the guarded high-quality Japanese speech corpus and its source-partitioned audio.

All audio is FLAC PCM16. Source sample rate and channel count are preserved. Every packaged item passed a source-to-FLAC bit-identical PCM round trip and a separate full-release decode/hash validation.

Corpus rows use portable locators of the form audio/<subset>/<group>/part-N.parquet#row=N.

Corpus overview

Corpus/config	Rows	Approx. hours
ja	20,354,333	35,729.01

Audio subset overview

Counts below are unique packaged audio rows.

Audio subset	Unique rows	Approx. hours	Rejected rows	Parquet GiB
game_dialogue	3,922,808	6,211.25	1	865.84
anime_dialogue	65,438	101.92	0	14.47
anime_dialogue_v2	230,170	377.90	0	48.99
character_dialogue	4,469	6.79	0	0.73
general_speech	16,131,448	29,031.39	0	1,872.31

JSONL examples

Two abridged metadata examples are shown below. Physical audio locators and source identifiers are visible only after access approval.

{"text":"うぅ～ん。","context":"","duration":1.58,"lang":"<|JA|>","language":"<|JA|>"}
{"text":"世界、大丈夫？","context":"うぅ～ん。","duration":2.86,"lang":"<|JA|>","language":"<|JA|>"}

Download

Approved users can download the complete gated repository:

from huggingface_hub import snapshot_download

snapshot_download(
    repo_id="WTForbes/ja",
    repo_type="dataset",
)

Or load the corpus configuration:

from datasets import load_dataset
corpus = load_dataset("WTForbes/ja", "ja")

Release totals

• Unique audio: 20,354,333
• Audio hours: 35,729.247
• Parquet size: 3.008974 TB (2.736646 TiB)

See release.json for exact per-subset counts, hours, bytes, and corpus checksums.