NTCIR-19 Tip-of-the-Tongue (ToT) Retrieval/QA Shared Task.

We are excited to announce the Call for Participation for NTCIR-19 Tip-of-the-Tongue (ToT) Shared Task. ToT known-item retrieval is defined as “an item identification task in which the searcher has previously experienced an item but cannot recall a reliable identifier”—i.e., “It’s on the tip of my tongue…”. After 3 successful years as a TREC Track, the ToT shared task is expanding to NTCIR for 2026. The NTCIR-19 ToT Shared Task will focus on open-domain ToT information needs in multiple languages (English, Chinese, Japanese, and Korean). You can participate in the shared task in any subset of these languages, and you are also welcome to present your work remotely at the NTCIR conference in Tokyo in December 2026.

Please visit the following websites for further information.
  Task guidelines: https://ntcir-tot.github.io/guidelines
  Registration: https://research.nii.ac.jp/ntcir/ntcir-19/howto.html (Deadline: June 1)

Important dates
  March 27: Release corpus and training queries
  May: Release test queries
  June 1st: Deadline for registration
   July (tentative): Deadline for submitting runs

Please consider participating and help us spread the word!

Best regards,
Fernando Diaz
On behalf of the NTCIR-19 ToT Shared Task organizers
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