I’m currently a 1st-year PhD candidate at the University of Tokyo, advised by Prof. Jun Rekimoto. My research interests lie primarily in the topic of voice user interaction, silent speech recognition, and multimodal input technologies. My educational background and work experience span electrical and electronics engineering (B.S., four years at UESTC) and applied computer science (M.S., two years at the University of Tokyo).

My CV is available here (updated Jan 2023)

Email: zxsu [at]

Address: Room A102, Daiwa Ubiquitous Computing Research Building, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8654, Japan.


  • Jan 14, 2023: My first-authored paper got accepted to CHI 2023. Can't wait to see everyone in Hamburg!

  • Jan 1, 2023: Started working as a Research Assistant at RIISE.

  • Oct 29, 2022: Attending UIST 2022 in Bend, Oregon. It is my first-ever in-person conference!

  • Aug 18, 2022: Our work-in-progress got accepted to the UIST 2022 poster session!

  • Aug 3, 2022: Secured a grant from the IIW program of UToyko!

  • Jun 3, 2022: Our project has been selected for the MITOU program!

  • Apr 23, 2022: 1 paper accepted to LREC 2022.

  • Apr 1, 2022: Received UTokyo PhD Fellowship to support my research.

  • Mar 14, 2022: Received my Master’s from the University of Tokyo with a department award. Incoming PhD student from April, 2022.

  • Feb 17, 2022: 2 papers accepted at CHI 2022. Big thanks to Xinlei and Naoki.

  • Mar 20, 2021: 1 paper accepted as a short paper at ETRA 2021.

  • Apr 1, 2020: Joined Rekimoto Lab as a master’s student.

Conference Publications

LipLearner: Customizable Silent Speech Interactions on Mobile Devices

CHI Conference on Human Factors in Computing Systems (CHI 2023, to appear)

Zixiong Su, Shitao Fang, Jun Rekimoto

SSR7000: A Synchronized Corpus of Ultrasound Tongue Imaging for End-to-End Silent Speech Recognition

The International Conference on Language Resources and Evaluation (LREC 2022)

Naoki Kimura, Zixiong Su, Takaaki Saeki and Jun Rekimoto.

Github (Dataset)

Paper (pdf)

Aware: Intuitive Device Activation Using Prosody for Natural Voice Interactions

CHI Conference on Human Factors in Computing Systems (CHI 2022)

Xinlei Zhang*, Zixiong Su*, and Jun Rekimoto (*equally contributed).

ACM Digital Library

Presentation Video

Github (Dataset)


SilentSpeller: Towards mobile, hands-free, silent speech text entry using electropalatography

CHI Conference on Human Factors in Computing Systems (CHI 2022)

Naoki Kimura, Tan Gemicioglu, Jonathan Womack, Richard Li, Yuhui Zhao, Abdelkareem Bedri, Zixiong Su, Alex Olwal, Jun Rekimoto, and Thad Starner.

ACM Digital Library

Presentation Video


Gaze+Lip: Rapid, Expressive interactions Combining Gaze Input and Silent Speech Commands for Hands-free Smart TV Control

ACM Symposium on Eye Tracking Research and Applications (ETRA2021)

Zixiong Su, Xinlei Zhang, Naoki Kimura, and Jun Rekimoto

ACM Digital Library


End-to-End Deep Learning Speech Recognition Model for Silent Speech Challenge

Conference of the International Speech Communication Association (INTERSPEECH 2020)

Naoki Kimura, Zixiong Su, and Takaaki Saeki.

Github (Source code)


Awards & Honors

  • Self-directed Research and Activity Fund

  • Information-technology Promotion Agency (IPA) MITOU Program

  • Leave a nest, Incu-be Award

  • Univerisity of Tokyo PhD Fellowship

  • The Univerisity of Tokyo, GSII, Best Master's Thesis

  • The University of Tokyo, World-leading Innovative Graduate Study Program Co-Designing Future Program

  • Japan Student Services Organization (JASSO), MEXT Scholarship

  • University of Electronic Science and Technology of China, Best Bachelor's Degree Thesis Award

  • China Scholarship Council (CSC) State Scholarship Fund

Sep 2022 - Mar. 2023

June 2022 - Mar. 2023

Apr. 2022

Apr. 2022 - Mar. 2025

Mar. 2022

Oct. 2020 - Mar. 2025

Oct. 2020

July 2019

Oct. 2017 - Sept. 2018


  • Research Institute for an Inclusive Society through Engineering(RIISE), Research Assistant

  • Japan Science and Technology Agency (JST), Research Assistant

Research on ECoG-based brain-computer communication in the Moonshot Research and Development Program

  • Sony Computer Science Laboratories, Inc. (Kyoto), Research Assistant

Research on 3D mesh authoring using natural language

  • Neural Pocket Inc., Software Engineer Internship

Development of an indoor autonomous driving robot

Jan. 2023 - Present

Apr. 2022 - Present

Nov. 2021 - Nov. 2022

July 2020 - July 2021