Koichi Namekata

I am a 4th-year undergraduate student at the University of Toronto, majoring in Computer Science and Statistics.

My research interests broadly span Computer Vision, Computer Graphics, and Machine Learning with focus on developing generative models and utilizing them for solving various downstream applications. In the past, I actively participated in competitive programming contests, where I won Bronze and Silver medals (1st place among the silver medalists) at the International Olympiad in Informatics. Please see below for more details.

LinkedIn  /  Google Scholar  /  Twitter  /  Email

profile photo


The topics of my previous research include Diffusion Models, GANs, Vision-Language Models, Representation Learning, and Unsupervised Learning.

emerdiff_small EmerDiff: Emerging Pixel-level Semantic Knowledge in Diffusion Models
Koichi Namekata, Amirmojtaba Sabour, Sanja Fidler, Seung Wook Kim
International Conference on Learning Representations (ICLR), 2024
Project page  /  arXiv  /  OpenReview  /  Twitter  /  bibtex

EmerDiff is an unsupervised image segmentor solely built on the semantic knowledge extracted from a pre-trained diffusion model. Our experiments suggest the presence of highly accurate pixel-level semantic knowledge in diffusion models.


Edge-Guided Anime Character Generator
Koichi Namekata
Regeneron International Science and Engineering Fair (ISEF), 2020

High school project funded by Mitou Junior program. Won Minister of State for Science and Technology Policy's Awards at Japan Students Science Awards (日本学生科学賞) in 2019.


University of Toronto | Major: Computer science & Statistics | GPA: 3.99/4.00 Sep. 2020 - Jun. 2025

Senior High School at Komaba, University of Tsukuba (筑波大学附属駒場高等学校) Apr. 2017 - Mar. 2020


International Olympiad in Informatics

The 31st International Olympiad in Informatics - Silver Medal (1st place among the silver medalists)
The 30th International Olympiad in Informatics - Bronze Medal
International Collegiate Programming Contest

ICPC North American Championship 2020-21 (team: UTSC A), 2021-22 (UofT Blue) & 2023-24 (UTSC Blue) Finalist
Asia-Pacific Informatics Olympiad

Asia-Pacific Informatics Olympiad 2018 - Silver Medal
Asia-Pacific Informatics Olympiad 2017 - Bronze Medal
Japanese Olympiad in Informatics

17th Japanese Olympiad in Informatics - 2nd Place
15th Japanese Olympiad in Informatics - 3rd Place
18th, 17th, 16th, 15th, 14th Japanese Olympiad in Informatics - Finalist (top20)
Japan Students Science Awards

Received Minister of State for Science and Technology Policy's Awards
Selected as a Japanese delegate for Regeneron International Science and Engineering Fair (ISEF) 2020
Supercomputing Contest

SuperCon 2019 (25th Supercomputing Contest for high school students) - 2nd place, received Institute Prize from the Institute of Electronics, Information and Communication Engineers and IPSJ
SuperCon 2017 (23rd Supercomputing Contest for high school students) - 2nd place
National Senior High School Programming Contest

2019 - 1st place (team: KMB86)
2018 - 1st place (team: KMB86)
16th International Students' Science Fair - Best Innovation Award in computer science (2020)
Mitou Junior Program - Certified as Mitou Junior Super Creator (2019)
IPSJ Excellent Student Award - 2019,2018,2017,2015

I borrowed the template from Jon Barron.