COLIEE 2026

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

This competition is run in association with the International Conference on Artificial Intelligence and Law (ICAIL) 2026, Singapore Management University (SMU), Singapore + Online (Hybrid). Workshop date at ICAIL2026 is 12th June 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.

Latest Updates

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7th March 2026: Submission deadline for Task 4 is extended to 18th March 2026 (Schedule).

4th March 2026: Task 4 Test data release is delayed to 5th March 2026.
25th February 2026: FAQ page is now available.
15th February 2026: Registration is closed. Test data (except Task 4) is sent to all the participants. If you have not received, please contact us.
13th February 2026: COLIEE2026 is accepted as a full-day event on 12th June 2026.
15th January 2026: Competition registration and Memorandum forms (Tasks 1 and 2, Task 3 and 4, Pilot Tasks) for the training data distribution open now.
9th January 2026: Tasks, Rules, Corpus, Evaluation and Submission details are now available.
10th December 2025: COLIEE-2026 website is open and Tentative schedule is available.

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.

Registration

COLIEE2026 competition participation registration is already closed.

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

Schedule