Ryukyuan Okinawan Corpus: 9,253 Japanese to Endangered Language Parallel Translations

9,253 parallel records translate Japanese to the endangered Ryukyuan (Okinawan) language, specifically the Shuri dialect. The dataset was structured from the 'Okinawan Language Dictionary' index published by the National Institute for Japanese Language and Linguistics (NINJAL) and uploaded by author 'doraking' in May 2026. It represents an extremely rare open data resource for NLP and machine learning, as UNESCO classifies Ryukyuan as a critically endangered language with an estimated speaker count below a few hundred.

Use Cases

• Train machine translation models based on the Japanese to Ryukyuan parallel translation pairs.
• Conduct linguistic analysis of an endangered language based on the structured dictionary entries and grammatical annotations.
• Build language preservation tools based on the digitized and annotated corpus of the Shuri dialect.
• Study language contact and change based on the comparative data between Japanese and Ryukyuan.

Strengths

• Contains 9,253 parallel translation records, providing a substantial foundation for low-resource language tasks.
• Includes 8,249 entries with kanji notation and 295 entries with part-of-speech and grammatical annotations, adding linguistic detail.
• Sourced from a structured, authoritative dictionary (NINJAL's 'Okinawan Language Dictionary') under a CC BY 4.0 license.
• Explicitly documents the language codes (ryu, jpn) and dialect (Shuri), ensuring clear provenance.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is known, but the specific file formats, size, and sample data are unavailable for preview.
• Data may reflect the geographic and lexical bias inherent to the source dictionary's coverage of the Shuri dialect.

Provenance

Source

National Institute for Japanese Language and Linguistics (NINJAL) 'Okinawan Language Dictionary' index.

Collection Method

Structured from the published dictionary index.

Time Range

null

Freshness

Last updated 2026-05-01 02:20:03; freshness should be verified.

Geography

Shuri dialect (central-southern Okinawa Island).