Dear LFG community, /The organizers of the HPSG conference and myself cordially invite you to share your results and discuss with us in our next international conference (hosted online). Please feel free to forward this invitation to anyone who might be interested./ The *2**9th International Conference on Head-Driven Phrase Structure Grammar* will be virtually hosted at Nagoya University and the National Institute for Japanese Language and Linguistics on 29 July - 31 July 2022. It is an /online event/. Abstracts are invited that address linguistic, foundational, or computational issues relating to or in the spirit of the framework of Head-Driven Phrase Structure Grammar. Comparison of HPSG work with related theoretical approaches is also welcome. *Conference Format*: The HPSG 2021 conference will be a two-day main conference. It will be followed by a one-day workshop on Computational Linguistics on East Asian languages, which will be announced separately. Presentations will be pre-recorded and pre-loaded on the conference website, and the discussion period will be online. *Submissions*: We welcome two types of submissions for the main HPSG conference: - Long papers (4-page abstract + 1 page data, figures & references; 20 minute pre-recorded presentation + 15 minute online discussion) - Short papers (2-page abstract + 1 page data, figures & references; 10 minute pre-recorded presentation + 10 minute online discussion) Please note that abstracts submitted for the "long paper" track can be accepted as "short papers" (and vice versa). Only "long papers" will appear in the proceedings. All abstracts should be submitted in PDF format via: https://easychair.org/conferences/?conf=hpsg22 All abstracts will be reviewed anonymously by at least two reviewers. The submissions should not include the authors' names, and authors are asked to avoid self-references. Please direct any questions to the Program Committee Chair: Elodie Winckel (hpsg22@easychair.org). A call for contributions to the proceedings will be issued after the Conference. Proceedings of previous conferences are available at: http://csli-publications.stanford.edu/HPSG/. *Important Dates*: Abstract submission deadline: March 16th 2022 (anywhere on earth) Notifications of acceptance: May 2nd 2022 Main Conference : July 29th-30th 2022 Workshop on  Computational Linguistics on East Asian languages : July 31st 2022 Conference proceedings submission: October 15th 2022 *Local Organizing Committee Chair: * David Oshima (Nagoya University) Yusuke Kubota (National Institute for Japanese Language and Linguistics)