Nobuyuki Umetani

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Associate Professor
Creative Informatics Department
The University of Tokyo

email: n.umetani [at]
office: Room 506, I-REF Bldg. 1-1 Yayoi, Bunkyo-ku, 113-0032, Tokyo (map)

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machine learning CFD

Learning Three-dimensional Flow for Interactive Aerodynamic Design

Nobuyuki Umetani, Bernd Bickel
ACM Transaction of Graphics (Siggraph 2018)
[Link] [pdf iconPaper] [Video] [youtube iconYouTube] [Data] [Slides]

|Design and Development Today|Electronics360||Institution of Mechanical Engineers|

machine learning 3D shapes

Exploring Generative 3D Shapes Using Autoencoder Networks

Nobuyuki Umetani
Siggraph Asia 2017 Technical Brief
[Link] [pdf iconPaper] [youtube iconYouTube] [Data] [Slides]

|Big Data News| SoHu|

machine learning 3D shapes

Printone: Interactive Resonance Simulation for Free-form Print-wind Instrument Design

Nobuyuki Umetani, Athina Panotopoulou, Ryan Schmidt, Emily Whiting
ACM Transaction on Graphics (SIGGARPH Asia 2016)
[Link] [Paper] [Video] [YouTube] [Appendix] [Slides]

|gizmodo | | New Atlas | Nanowerk | Crazy Engineers | 3ders | Science Daily | Fabbaloo | MIPro | Science Newsline| all3dp | Dexinger | gfxspeak | MicroFabricator | 3DVF | 3Druck | MakersLove | IDArts | inplus | 3D imperial|


SurfCuit: Surface Mounted Circuits on 3D Prints

Nobuyuki Umetani, Ryan Schmidt
IEEE Computer Graphics and Applications
[Link] [Video] [YouTube]

Motion Amplifiers: Sketching Dynamic Illustrations Using the Principles of 2D Animation

Rubaiat Habib, Tovi Grossman, Nobuyuki Umetani, George Fitzmaurice
CHI 2016 Conference proceedings
meltable thumbnail

Meltables: Fabrication of Complex 3D Curves by Melting

Andrew O. Sageman-Furnas,Nobuyuki Umetani, Ryan Schmidt
SIGGRAPH Asia 2015 Technical Brief


OmniAD: Data-driven Omni-directional Aerodynamics

Tobias Martin*,Nobuyuki Umetani*,Bernd Bickel (*=joint 1st authors)
ACM Transaction on Graphics (SIGGRAPH 2015)
[Link] [YouTube]
flat fit fab

FlatFitFab: Interactive Modeling with Planar Sections

James McCrae, Nobuyuki Umetani, Karan Singh
User Interface Software and Technology 2014 (UIST 2014)
[Link] [YouTube]
PBD rod

Position-based Elastic Rod

Nobuyuki Umetani, Ryan Schmidt, Jos Stam
Proc. SCA 2014
(Also SIGGRAPH 2014 Talk)
[Project Page] [Paper] [YouTube] [Slides]
branching support

Branching Support Structures for 3D Printing

Ryan Schmidt, Nobuyuki Umetani

Guided Exploration of Physically Valid Shapes for Furniture Design (CACM Research Highlights)

Nobuyuki Umetani, Takeo Igarashi, Niloy J. Mitra
Communications of the ACM

Pteromys: Interactive Design and Optimization of Free-formed Free-flight Model Airplanes

Nobuyuki Umetani, Yuki Koyama, Ryan Schdmit, Takeo Igarashi
ACM Transaction on Graphics (SIGGRAPH 2014)
[Project Page] [PDF] [YouTube]

|New Scientist | CNET | FutureZone| Golem.De | Industry Tap | Gigazine|


Sensitivity-optimized Rigging for Example-based Real-time Clothing Synthesis

Weiwei Xu*, Nobuyuki Umentani*, Qianwen Chao, Jie Mao, Xiaogang Jin, Xin Tong (*=joint 1st authors)
ACM Transaction on Graphics (SIGGRAPH 2014)
[pdf iconPaper] [Video] [Slides]

Macroscopic and Microscopic Deformation Coupling in Up-sampled Cloth Simulation

Shunsuke Saito, Nobuyuki Umetani, Shigeo Morishima
Computer Animation and Virtual Worlds Journal, CASA 2014 Special Issue, 25(3-4), May-August 2014, (to appear).
[YouTube] [Link]

Cross-sectional Structual Analysis for 3D Printing Optimization

Nobuyuki Umetani, Ryan Schmidt
SIGGRAPH Asia 2013 Technical Brief
[Project Page] [Paper] [YouTube] [Slides]

BodyAvatar: Creating 3-D Avatars with Your Body and Imagination

Yupeng Zhang, Teng Han, Zhimin Ren, Nobuyuki Umetani, Xin Tong, Yang Liu, Takaaki Shiratori, Xiang Cao.
UIST 2013
[Project Page]

Interactive Design Exploration of Physically Valid Shapes

Nobuyuki Umetani
PhD Dissertation, The University of Tokyo, 2012

Guided Exploration of Physically Valid Shapes for Furniture Design

Nobuyuki Umetani, Takeo Igarashi, Niloy J. Mitra
ACM Transaction on Gracphis (SIGGRAPH 2012)
[Project Page] [Paper] [YouTube]

Real-Time Example-Based Elastic Deformation

Yuki Koyama, Kenshi Takayama, Nobuyuki Umetani, Takeo Igarashi
Proc. SCA 2012
[Project Page]

A Kinematic Approach for Efficient and Robust Simulation of the Cardiac Beating Motion

Takashi Ijiri, Takashi Ashihara, Nobuyuki Umetani, Takeo Igarashi, Ryo Haraguchi, Hideo Yokota, and Kazuo Nakazawa
[Project Page]

Sketch-based Dynamic Illustration of Fluid Systems

Bo Zhu, Michiaki Iwata, Ryo Haraguchi, Takashi Ashihara, Nobuyuki Umetani, Takeo Igarashi, Kazuo Nakazawa
ACM Transaction on Graphics (SIGGRAPH ASIA 2011)
[Project Page]

Sensitive Couture for Interactive Garment Editing and Modeling

Nobuyuki Umetani, Danny M. Kaufman, Takeo Igarashi, and Eitan Grinspun
ACM Transactions on Graphics (SIGGRAPH 2011)
[Project Page] [Paper] [Video] [Slides] [Bibtex] [Demo Code]

Designing Custommade Metallophone with Concurrent Eigenanalysis

Nobuyuki Umetani, Jun Mitani, Takeo Igarashi and Kenshi Takayama
New Interfaces for Musical Expression++ (NIME++), Australia, 15-18th June, 2010

A Film Balloon Design System Integrated with Shell Element Simulation

Yohsuke FURUTA, Nobuyuki UMETANI, Jun MITANI, Takeo IGARASHI, and Yukio FUKUI,
the 31st annual conference of the European Association for Computer Graphics (EUROGRAPHICS 2010), short paper, May 3-7, 2010
responsive fem

Responsive FEM for Aiding Interactive Geometric Modeling

Nobuyuki Umetani, Kenshi Takayama, Jun Mitani, Takeo Igarashi,
IEEE Computer Graphics & Applications, Volume 31 Issue 5
[Link] [Video]


A Multigrid-Based Shifted-Laplacian Preconditioner for a Fourth-Order Helmholtz Discretization

Nobuyuki Umetani, Scott Maclachlan, Kees Oosterlee
Numerical Linear Algebra with Applications,Volume 16, Issue 8, pp603-626,(2008)


The sinus of Valsalva relieves abnormal stress on aortic valve leaflets by facilitating smooth closure

Susumu Katayama, Nobuyuki Umetani, Seiryo Sugiura, and Toshiaki Hisada
The Journal of Thoracic and Cardiovascular Surgery, vol.136, no.6, pp.1528-1535,(2008)


  • Jul. 2018: I join the faculty of the University of Tokyo as a project lecturer
  • Mar. 2018: One paper is accepted to Siggraph 2018 Technical Paer program!
  • Feb. 2018: I will serve on the IPC of the SCA 2018
  • Sept. 2017: One paper is accepted to Siggraph Asia Technical Brief program
  • Apr. 2017: I will serve on the IPC of WSCG and CAD/Graphics 2017 [link], [link]
  • Mar. 2017: I will serve on the IPC of SCA 2017 [link]
  • Mar. 2017: I will give a guest lecture in the University of Toronto [Link][slides]
  • Feb. 2017: I will join 2017 Bellairs Workshop on Computer Animation [link]


  • SIGGRAPH 2018 Technical Paper Preview video YouTube
  • ACM Transaction on Graphics 35(6)/SIGGRAPH Asia 2016 Proceedings
  • SIGGRAPH 2015 Technical Paper Preview video YouTube
  • ACM Transaction on Graphics 30(4)/SIGGRAPH 2011 Proceedings
  • SIGGRAPH 2011 Technical Ppaer Preview VideoYouTube


Invited Talks

  • “Simulation-guided Interactive Exploration of Functional Design”, September 2016, Host: Stelian Coros: VASC Seminar at Carngie Mellon University
  • “Simulation-guided Interactive Exploration of Functional Design”, May 2016, Host: Paul Kry
  • “Simulation-guided Interactive Exploration of Functional Design” October 2015 Host: Kun Xu, Pacific Graphics 2015 Invited Talk
  • “Simulation-Guided Creation: Interactive Simulation to Animate and Fabricate your Own Idea”, June 2015, Host: Marie-Paule Cani:“Expressive modeling : New advances towards the seamless creation of 3D content”
  • “Interactive Design of Functional Shapes”, Schloss Dagstuhl, Germany, September 2014, Host: Dagstuhl Seminar: "Computational Aspects of Fabrication"
  • "Interactive Authoring for Designing Physically Valid Shapes”, University of Manitoba, May 2013, Host: Jim Young
  • “Interactive Exploration of Physically Valid Shapes”, Disney Research Zurich, February 2013, Host: Bernd Bickel
  • "Integration of Design, Simulation and Interaction”, Max Planck Institute Infomatik, October 2011, Host: Michael Wand
  • “Interactive integration of design and real-time simulation”, New York University, September 2010 Host: Kenshi Takayama

Talk Pictures

  • SIGGARPH Asia 2017 (Bangkok)
  • SIGGARPH Asia 2016 (Kobe)

Book Chapters

  • CG Gems 2013 (in Japanese)
  • CG Gems 2012 (in Japanese)

Maker Event

  • Maker Festival Toronto 2016
  • Making SIGGRAPH 2016


Short Bio

I finished my Ph.D. in September 2012 under the supervision of Prof. Takeo Igarashi. Currently, I am a research scientist at Autodesk Research. Before that, I worked for Autodesk Research in Toronto (with Ryan Schmidt) and Disney Research Zuich (with Bernd Bickel) as a post doc for one year each. When I was a master's student, I visited the applied mathematic department in TU Delft (Netherland) and worked with Prof. Kees Oosterlee and Prof. Scott MacLachlan. After started my Ph.D, I visited Columbia University in New York and work with Danny Kaufman and Prof. Eitan Grinspun. in another research visit in my Ph.D, I collaborated with Prof. Niloy Mitra at the University Collage London. In addition, I won a fellowship and an internship at Microsoft Research Asia (working with Weiwei Xu and Xin Tong) in February 2012.

Research Interest

I am interested in computer graphics, interactive design interface and mechanical engineering, especially:

  • Integrated design, simulation and interaction
  • Interactive simulation
  • Fabrication
  • Finite element methods
  • Machine learning for 3D geometry
  • Data-driven physics modeling
  • Biomechanical simulation



Program Committees:

  • EuroGraphics short paper(2017)
  • CASA(2017)
  • Pacific Graphics(2015,2016)
  • Symposium on Computer Animation(2016,2017)
  • CAD/Graphics(2017)
  • WSCG(2017)
  • ACM SIGGRAPH Technical Paper (2015)
  • ACM SIGGRAPH ASIA Brief and Poster (2015)

Technical Paper Reviewer:

  • ACM SIGGRAPH (2012-2017)
  • ACM SIGGRAPH Course (2014)
  • ACM SIGGRAPH ASIA (2011-2016)
  • Eurographics (2012-2016)
  • Pacific Graphics (2014-2016)
  • UIST (2015,2016)
  • CHI (2015)
  • 3DUI (2014)
  • ACM Transaction on Graphics(2015)
  • Computer Graphics Forum (2015)
  • Computer-Aided Design (2015)
  • IEEE TVCG (2014)
  • IEICE (2014)


Ph.D., Computer Science (Oct.2009–Sept.2012)
The University of Tokyo, Japan
Thesis: Interactive Design Exploration of Physically Valid Shapes
Adviser: Takeo Igarashi

M.S., Frontier Science (Apr.2006–Sept.2009)
The University of Tokyo, Japan
Thesis: Coupling analysis of skeletal muscles and skeletal system using Lagrange multiplier
Adviser: Toshiaki Hisada

B.S., Mechanical Engineering (Apr.2002–Mar.2006)
The University of Tokyo, Japan
Thesis: Analysis of open and close phase of heart valve by changing connectivity in time step
Adviser: Toshiaki Hisada


Project Lecturer (July 2018 - present)
The University of Tokyo, Tokyo, Japan

Research Scientist (March 2015-June 2018)
Autodesk Research, Toronto, Canada

Postdoctoral Researcher (March 2014-February 2015)
Disney Research Zürich, Switzerland

Project Researcher (December 2013-Februrary 2014)
The University of Tokyo/JST ERATO, Japan

Fix-term Research Scientist (November 2012-November 2013)
Autodesk Research, Toronto, Canada

Internship Researcher (February 2012-May 2012)
Microsoft Research Asia, Beijing, China
Supervisor: Dr. Weiwei Xu

Research Fellow (April 2010-October 2012)
Japan Society for the Promotion of Science

Research Assistant (2008 - 2010)
JST ERATO Igarashi Design Interface Project, Japan
Supervisor: Dr. Takeo Igarashi

Chief Developer (2008)
Information – technology Promotion Agency (IPA) Exploratory Software Project, Japan
Supervisor: Dr. Ikuo Takeuchi

Academic Visits

Computer Science Department,
University College London, UK (August2011-November-2011)
Mentor: Niloy J. Mitra

Columbia Computer Graphics Group, Computer Science Department,
Columbia University, USA (April 2010-March 2011)
Mentor: Eitan Grinspun

Numerical Analysis Group, Delft Institute of Applied Mathematics,
Delft University of Technology, The Netherlands (April 2007-March 2008)
Mentor: Kees Oosterlee

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