kana-kanji-pairs

Japanese kana-to-kanji conversion candidate dataset.

Overview

Metric	Value
Total pairs	1,124,675
File size	~112MB
Format	JSONL

Candidate Distribution

Candidates	Entries	%
n>=2	363,708	32.3%
n>=5	40,929	3.6%
n>=10	9,401	0.8%
n>=20	2,448	0.2%
n>=100	34	<0.1%
max	259	-

Data Sources

Source	Entries	Description
mozc	753,628	Google mozc dictionary
jmdict	221,228	JMdict Japanese-Multilingual Dictionary
wikipedia_mecab	94,938	Wikipedia text analyzed with MeCab+UniDic
sudachi	30,937	SudachiDict core vocabulary
wikipedia_ruby	23,944	Wikipedia ruby annotations

Data Format

Main dataset (data/train.jsonl)

{
  "input": "かがく",
  "output": ["科学", "化学", "下顎", "価額"],
  "source": "wikipedia_mecab",
  "count": 4
}

Wikipedia dataset (wikipedia/*.jsonl)

{
  "input": "かがく",
  "output": ["科学", "化学", "下顎", "価額"],
  "source": "wikipedia_mecab",
  "count": 4,
  "frequencies": {"科学": 303774, "化学": 122431, ...}
}

Fields

Field	Description
input	Reading (hiragana, may include ・ゔヽヾゝゞ)
output	Conversion candidates (ordered by frequency)
source	Data source identifier
count	Number of candidates
frequencies	Occurrence counts (wikipedia/*.jsonl only)

Files

data/
└── train.jsonl              # Full dataset (1,124,675 entries)
wikipedia/
├── mecab.jsonl              # Wikipedia MeCab with frequencies (94,938 entries)
└── ruby.jsonl               # Wikipedia Ruby with frequencies (23,944 entries)
old/
└── mozc_n10_20260102.jsonl  # Legacy mozc-only data (753,628 entries, n<=10)

Usage

from datasets import load_dataset

# Load full dataset
dataset = load_dataset("katsukiono/kana-kanji-pairs")

# Filter by source
mozc_data = [x for x in dataset["train"] if x["source"] == "mozc"]
wiki_data = [x for x in dataset["train"] if x["source"].startswith("wikipedia")]

# Load Wikipedia with frequencies
wiki_mecab = load_dataset("katsukiono/kana-kanji-pairs", data_files="wikipedia/mecab.jsonl")

Licenses

This dataset combines data from multiple sources with different licenses:

Source	License
mozc	BSD 3-Clause
jmdict	CC BY-SA 4.0
sudachi	Apache 2.0
wikipedia_mecab	CC BY-SA 4.0
wikipedia_ruby	CC BY-SA 4.0

See licenses/ directory for full license texts.

Terms of Use

• Attribution required for CC BY-SA sources
• Include copyright notices for BSD/Apache sources
• ShareAlike: derivatives of CC BY-SA content must use same license

Source Repositories

• mozc: https://github.com/google/mozc
• JMdict: https://www.edrdg.org/jmdict/j_jmdict.html
• SudachiDict: https://github.com/WorksApplications/SudachiDict
• Wikipedia: https://dumps.wikimedia.org/jawiki/
• MeCab: https://taku910.github.io/mecab/
• UniDic: https://clrd.ninjal.ac.jp/unidic/