For the major languages of the world, progress has been made in the creation of corpora annotated with syntactic information (treebanks), and significant results have been gained in the fields of linguistics and language processing using these corpora for research. With regard to Japanese, at the National Institute for Japanese Language and Linguistics (NINJAL), the Collaborative Research Project “Development of and Linguistic Research with a Parsed Corpus of Japanese” began in 2016, and built the NPCMJ (NINJAL Parsed Corpus of Modern Japanese). This project aimed to annotate syntactic and semantic information to texts of written and spoken Contemporary Japanese, making it possible to search and extract from the data a rich inventory of function words, phrase structures, clause types, and complex constructions, and to use the results actively for research. The project ended in March 2022, but the results of the project are available to the public in the form of approximately 90,000 sentences (90,000 trees).

Source	Number of Trees	Word Count
Aozora Bunko	12,810	246,568
Bible	1,664	26,089
Blog	219	3,218
Book	553	10,992
Dictionary	26,279	141,297
Diet	1,698	32,715
Essay	3,264	70,167
Fiction	7,597	84,169
Law	337	6,943
News	5,979	90,570
Nonfiction	234	4,118
Patent	261	8,636
Spoken	2,382	12,720
TED Talk	1,453	21,420
Textbook	6,950	63,952
Whitepaper	13,433	398,347
Wikipedia	2,745	59,833
Misc.	2,211	22,754
Total	90,069	1,304,508