jpWaC: Japanese corpus from the .jp domain

The Japanese web corpus (jpWaC) is a Japanese corpus made up of texts collected from the Internet. The corpus was prepared by Tomaž Erjavec using a list of URLs provided by Serge Sharoff at the University of Leeds. The standards of corpus preparation are described in the document A Corpus Factory for Many Languages (Kilgarriff et al. at LREC 2010).

The corpus was segmented, part-of-speech tagged and lemmatised using Chasen, an open-source toolset for Japanese. Word sketches were prepared by Irena Srdanovic.

Part-of-speech tagset

The Japanese WaC corpus has the following part-of-speech tagset legend.

Tools to work with the Japanese Web corpus

A complete set of Sketch Engine tools is available to work with this Japanese corpus to generate:

  • word sketch – Japanese collocations categorized by grammatical relations
  • thesaurus – synonyms and similar words for every word
  • word lists – lists of Japanese nouns, verbs, adjectives etc. organized by frequency
  • n-grams – frequency list of multi-word units
  • concordance – examples in context
  • keywords– terminology extraction of one-word
  • text type analysis – statistics of metadata in the corpus

version 2.0 (25 February 2011)

  • added a new corpus attribute jp_tag which contains Japanese names of the part-of-speech tags

WaC corpora

BARONI, Marco, et al. The WaCky wide web: a collection of very large linguistically processed web-crawledcorporaLanguage resources and evaluation, 2009, 43.3: 209-226.

Corpus factory method

Kilgarriff, A., Reddy, S., Pomikálek, J., & Avinesh, P. V. S. (2010, May). A corpus factory for many languages. In LREC.

Japenese word sketches

Srdanović, I., Naomi, I. D. A., Bučar, C. S., Kilgarriff, A., & Kovář, V. (2011). Japanese Word Sketches: Advances and ProblemsActa Linguistica Asiatica1(2), 63-82.

Search the Japanese corpus

Sketch Engine offers a range of tools to work with this Japanese corpus from the web.


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