About

Note: I am currently seeking postdoc or research scientist positions, starting from April 2026. Please feel free to reach out if you are aware of any relevant opportunities.

Hi, I'm Kenji Tojo (東條建治), a Ph.D. student at the Creative Informatics Department of the University of Tokyo, advised by Prof. Nobuyuki Umetani.

I work at the intersection of computer graphics, computer vision, and machine learning. My passion lies in bridging algorithmic innovation with practical design applications, with the goal of advancing both creative tools and scientific understanding.

Publications

Strands2Cards: Automatic Generation of Hair Cards from Strands

Kenji Tojo,  Liwen Hu,  Nobuyuki Umetani,  Hao Li

Converting hair strands to polygon strips for real-time rendering.
Paper (additional details are TBA)
ACM SIGGRAPH Asia 2025 - Conference Track

GreenCloud: Volumetric Gradient Filtering via Regularized Green’s Functions

Kenji Tojo,  Nobuyuki Umetani

Gradient filtering and more for point-based geometries.
Project Website
Symposium on Geometry Processing (SGP) 2025
🏆 Best Paper Honorable Mention 🏆

The Mokume Dataset and Inverse Texturing of Solid Wood

Maria Larsson,  Hodaka Yamaguchi,  Ehsan Pajouheshgar,  I-Chao Shen,  Kenji Tojo,  Chia-Ming Chang,  Lars Hansson,  Olof Broman,  Takashi Ijiri,  Ariel Shamir,  Wenzel Jakob,  Takeo Igarashi

A dataset of annual ring patterns and an inverse texturing pipeline.
Project Website
SIGGRAPH 2025 / ACM Transactions on Graphics

3D Gabor Splatting: Reconstruction of High-frequency Surface Texture using Gabor Noise

Haato Watanabe,  Kenji Tojo,  Nobuyuki Umetani

Efficient high-frequency 3D Gaussian splatting using Gabor noise.
Project Website
Eurographics 2025 Short Paper

Free-form Floor Plan Design using Differentiable Voronoi Diagram

Xuanyu Wu,  Kenji Tojo,  Nobuyuki Umetani

Hybrid explicit/implicit representation for floor plan generation.
Project Website
Pacific Graphics 2024

Fabricable 3D Wire Art

Kenji Tojo,  Ariel Shamir,  Bernd Bickel,  Nobuyuki Umetani

Creating fabricable 3D wire sculptures from text and more.
Project Website
ACM SIGGRAPH 2024 - Conference Track

Stealth Shaper: Reflectivity Optimization as Surface Stylization

Kenji Tojo,  Ariel Shamir,  Bernd Bickel,  Nobuyuki Umetani

Optimizing reflectivity, while preserving the original geometry.
Project Website
ACM SIGGRAPH 2023 - Conference Track

Recolorable Posterization of Volumetric Radiance Fields Using Visibility-Weighted Palette Extraction

Kenji Tojo,  Nobuyuki Umetani

Palette-based stylization and recoloring of radiance fields.
Project Website
Eurographics Symposium on Rendering (EGSR) 2022

Neural Motion Compression with Frequency-adaptive Fourier Feature Network

Kenji Tojo,  Yifei Chen,  Nobuyuki Umetani

Compressing motion data using implicit neural representations.
Project Website  /  Code
Eurographics 2022 Short Paper (EG 2022 Short)

Experience

Visiting Researcher - ETH Zürich, Switzerland (June – August 2025)

  • Mentor: Bernd Bickel

Visiting Researcher - MBZUAI, United Arab Emirates (September – November 2024)

  • Mentor: Hao Li

Visiting Researcher - ISTA, Austria (December 2023 – January 2024)

  • Mentor: Bernd Bickel

Software Engineering Intern - Morgenrot Inc. (March 2021)

Research Assistant - The University of Tokyo (February – March 2021)

  • Mentor: Takeo Igarashi

Awards

Best Paper Honorable Mention – SGP 2025

  • Recognized for the paper GreenCloud: Volumetric Gradient Filtering via Regularized Green’s Functions.
  • July 2025

JSPS Fellowship Supplement for Outstanding Research Progress

  • Awarded a competitive annual supplement (360,000 JPY) in recognition of exceptional research performance during JSPS Fellowship.
  • April 2025 - March 2026

Japan Society for the Promotion of Science (JSPS) – Research Fellowship (DC1)

  • Awarded a prestigious national fellowship providing 2,400,000 JPY annually to support doctoral research.
  • April 2023 - March 2026

Dean’s Prize for Outstanding Master’s Research (The University of Tokyo)

  • Awarded for the best Master’s thesis of the year in the Creative Informatics Department.
  • March 2023

Misc.

Independent errata of a type theory textbook

  • Article (arXiv)
  • I wrote Section 4, which proves the principal type's existence.

Test Scores

  • TOEFL iBT: 105 (October 15, 2022)