COLIEE 2026
COLIEE2026

COLIEE 2026

Welcome to the 13th Competition on Legal Information Extraction and Entailment (COLIEE-2026).

The aim of COLIEE is to formulate a challenging legal informatics competition that would engage researchers around the world, and build a community of practice regarding legal information extraction and textual entailment, so that the adoption and adaptation of general methods from a variety of fields is considered, and that participants share their approaches, problems, and results.

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Competition Tasks

  • Task 1: Case law retrieval for decision support. Canadian law, English data. (CL-IR)
  • Task 2: Identifying decision-entailing paragraphs in cases. Canadian law, English data. (CL-DE)
  • Task 3: Statute retrieval and entailment for yes/no questions. Japanese law, Japanese data. (SL-QA)
  • Task 4: Statute entailment for yes/no questions with relevant articles. Japanese law, Japanese data. (SL-TE)
  • Pilot Task 1: Tort prediction from facts and arguments. Japanese law, Japanese data. (TP)
  • Pilot Task 2: Rationale extraction for accepted arguments. Japanese law, Japanese data. (RE)
Task 3 is not a simple statute retrieval task. From this year, the participants are expected to submit entailment results with relevant articles.

Data for Tasks 1 and 2 will be distributed in English, while data for Tasks 3, 4, and Pilot tasks will be distributed in Japanese. However, the use of machine translation in proposed systems to process data in any language is permitted.

The more details of COLIEE-2026 will be announced by early January 2026.

Registration

TBA

Citations

For the overview and fundamental ideas of the COLIEE, please cite the paper below:

  • Juliano Rabelo, Randy Goebel, Mi-Young Kim, Yoshinobu Kano, Masaharu Yoshioka and Ken Satoh: Overview and Discussion of the Competition on Legal Information Extraction/Entailment (COLIEE) 2023. The Review of Socionetwork Strategies, Vol. 18, No. 1, pp. 27-47, 2024.

Recommended citation for the COLIEE 2026 (overview paper of COLIEE 2026) will be informed before the submission of the final paper.

Committee

Organizers

  • Randy Goebel (University of Alberta, Canada)
  • Yoshinobu Kano (Shizuoka University, Japan)
  • Mi-Young Kim (University of Alberta, Canada)
  • Calum Kwan (University of Alberta, Canada)
  • Ken Satoh (Center for Juris-informatics, ROIS-DS , Japan)
  • Hiroaki Yamada (Institute of Science Tokyo, Japan)
  • Masaharu Yoshioka (Hokkaido University, Japan)

Program Committee

TBD

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Schedule