Below is a selection of projects that I have worked on in the past. Several of these projects are still ongoing, as part of the Wikitopia Project. This page is no longer being updated, so for latest information about my research please visit the Wikitopia Project website.

以下は過去に携わってきたプロジェクトの一部です。いくつかのプロジェクトはWikitopia Projectに引き継がれ、今も継続しています。このページは現在更新されていませんので、最新の研究内容についてはWikitopia Projectのウェブサイトをご覧ください。


Printable Garden

Printable Garden is a 3D printing technology that enables fabrication of freeform hydroponic "gardens", i.e., 3D volumes with various species of plants growing on their surfaces. The gardens are printed in fine 3D mesh structures, using a specialized polymer that makes the volumes function as soil substitutes. The technology is scalable, and can theoretically fabricate large-scale vertical gardens, rooftop farms, pocket parks, etc. In the future, we believe the technology may be extended to print complex ecosystems supporting diverse flora and fauna ("printable nature").



• Takeuchi, Y. 3D Printable Hydroponics: A Digital Fabrication Pipeline for Soilless Plant Cultivation. IEEE Access, Volume 7. pp.35863-35873. 2019. Download (PDF, 6.7MB)

• Takeuchi, Y. Printable Hydroponic Gardens: Initial Explorations and Considerations. In Ext. Abst. (alt.chi) of the 34th ACM Conference on Human Factors in Computing Systems (CHI 2016). pp.449-458. Download (PDF, 2.8MB)


Integral Illumination

Integral Illumination is a versatile programmable lighting technology that allows a single panel-shaped device to mimic the illumination effects of a wide range of light sources, such as spotlight, chandelier, sunlight, etc. The technology relies on an optical principle similar to that used in creating glasses-free 3D displays. By enabling fine control of the lightscape, the technology makes it possible for users to dynamically alter the ambience of an environment (both indoors and outdoors) with high degrees of freedom.

In collaboration with Shunichi Suwa and Kunihiko Nagamine.



• Takeuchi, Y., Suwa, S., Nagamine, K. AnyLight: Programmable Ambient Illumination via Computational Light Fields. In Proc. of the 2016 ACM International Conference on Interactive Surfaces and Spaces (ISS 2016). pp.39-48. Download (PDF, 4.5MB)

• Takeuchi, Y., Suwa, S., Nagamine, K. AnyLight: An Integral Illumination Device. In SIGGRAPH 2016 Emerging Technologies. Article No.1.



ClayVision is an augmented reality system for mobile devices, that overlays digital information to cities not through the prevailing approach of adding floating objects, panels or arrows, but through real-time transformations of the built environment. Users of the system can dynamically redesign the city according to their needs and preferences; for example, heights of nearby buildings may be adjusted to reflect Yelp ratings when looking for restaurants.

In collaboration with Ken Perlin.



• Takeuchi, Y., Perlin, K. ClayVision: The (Elastic) Image of the City. In Proc. of the 30th ACM Conference on Human Factors in Computing Systems (CHI 2012). pp.2411-2420. Best Paper Award. Download (PDF, 3.9MB)


Parallel Cities

Parallel Cities are live urban simulations that are consistently kept "true to life" by analyzing real-time information such as SNS feeds. The simulations are densely populated with people and traffic, whose behaviors may deviate from reality in their microscopic details, but are largely faithful at the coarse, macroscopic level. The user experience is comparable to having the power to freely open "windows" to arbitrary locations in the city. Part of the code was also used in MIMMI.



• Takeuchi, Y. Parallel Cities. In Proc. of the 19th ACM Symposium on Virtual Reality Software and Technology (VRST 2013). pp.89-92. Download (PDF, 2.0MB)



MIMMI is a large-scale interactive installation set up in Minneapolis, USA during the latter half of 2013. The installation continuously analyzed the collective "mood" of the city by mining Twitter feeds, and expressed it using light, mist and sound. The project was carried out by an international, cross-disciplinary team of experts; I was in charge of developing the digital components. The piece was a finalist for the 2015 Architizer A+ Awards.

In collaboration with Bradley Cantrell, Jack Cochran, Carl Koepcke, Peter Mabardi, Artem Melikyan, Allen Sayegh and Ziyi Zhang.

2013年の後半、米国ミネアポリス市に半年間設置された大型インスタレーションです。Twitterを解析して割り出したその時々の街の「気分」を、光や音、霧によって表現する構造物です。建築家やデザイナーとの共同制作で、私は技術面を担当しました。先端技術を応用した独創的な建築物として、2015 Architizer A+ Awardsに入賞を果たしています。


Weightless Walls

Weightless Walls are invisible, sound-blocking walls that can be created anywhere in a room. Users wear custom headsets that allow them to engage in VoIP-like, but "spatially faithful" conversations with each other. As the headsets block any natural sound entering users' ears, the setup allows all conversations between users to be mediated by a central server, which performs real-time audio processing to produce sensations of virtual walls. The system is intended for use in open-plan offices, enabling workers to freely create acoustically isolated regions to have quiet meetings, presentations, etc.



• Takeuchi, Y. Weightless Walls and the Future Office. In Proc. of the 28th ACM Conference on Human Factors in Computing Systems (CHI 2010). pp.619-628. Download (PDF, 3.0MB)



Whirlstools is a concept for kinetic street furniture that encourages spontaneous communication in public spaces. When a slight angle is added to the top surface of a cylindrical stool, sitting in one direction becomes more comfortable compared to others. By dynamically adjusting the orientations of vacant stools, the furniture implicitly steers people into sitting face-to-face with one another, raising the likelihood of social interactions.

In collaboration with Jean You.



• Takeuchi, Y., You, J. Whirlstools: Kinetic Furniture with Adaptive Affordance. In Ext. Abst. of the 32nd ACM Conference on Human Factors in Computing Systems (CHI 2014). pp.1885-1890. Download (PDF, 2.8MB)


Gilded Gait

Gilded Gait is a pair of haptic insoles that transforms perceptions of ground texture using vibrotactile feedback. The device is primarily intended to be used for urban navigation — users can assign distinct virtual ground textures to arbitrary streets, regions, etc. The device relies on principles similar to that of haptic feedback for touchscreens.



• Takeuchi, Y. Gilded Gait: Reshaping the Urban Experience with Augmented Footsteps. In Proc. of the 23rd ACM Symposium on User Interface Software and Technology (UIST 2010). pp.185-188. Download (PDF, 1.4MB)

ACM ISS 2018

ACM ISS 2018

I co-chaired the international conference ACM ISS 2018 (The 2018 ACM International Conference on Interactive Surfaces and Spaces), held in Tokyo, Japan in November 2018. I also designed the logo!

2018年11月に東京で開催された国際会議、ACM ISS 2018(The 2018 ACM International Conference on Interactive Surfaces and Spaces)の運営委員長を務めました。ロゴやポスター等のデザインも担当しました。



Invisibot is a transparent robot that jumps around from block to block. Although the robot itself is invisible, its expressive motions can be observed from footprints that appear on the blocks. The robot hops over when it finds another block nearby. Its jumping ability (relative to its body size) is such that it easily surpasses the human world record. The robot craves attention, and will begin stamping its feet in frustration if left alone.



Remembered Presence

Remembered Presence is a responsive furniture that captures traces of interactions through color change and physical deformation. Memories of human presence are temporarily left behind as glowing silhouettes of light.

In collaboration with Helena Slosar and Melissa Kit Chow.



• Howeler, E. (Ed.). GSD Platform 4. ACTAR, Harvard Graduate School of Design. 2011.



Clockzilla is a clock widget for the (now discontinued) Sony dash, designed so that nearsighted people can easily read the time. The widget tries to make the clock face appear as large as possible, by only showing parts that are necessary to read the current time.

現在の時刻を読み取るのに必要な部分だけを拡大して表示する置き時計です。近視の人でも簡単に時間がわかります。自宅で使っていますが思った以上に便利なので、いずれRaspberry Piなど安価な部品の組み合わせで作り直して、Web上で作り方を公開したいと思っています。



Edoshop is an iPhone app (no longer available for download) that turns photos into ukiyo-e style images. The app reached 4th place in the Japanese iTunes Store Free App Ranking.




CityVoyager is an intelligent city guide that provides customized shop recommendations to users. Users' preferences are estimated by analyzing their long-term location history. The project became part of my PhD thesis, which explored different ways in which digital systems can be made to adapt to individual lifestyles. My earliest published research project!


Publications (selected):

• Takeuchi, Y., Sugimoto, M. A User-Adaptive City Guide System with an Unobtrusive Navigation Interface. Personal and Ubiquitous Computing, vol.13, no.2. pp.119-132. 2007.

• Takeuchi, Y., Sugimoto, M. CityVoyager: An Outdoor Recommendation System based on User Location History. In Proc. of the 3rd International Conference on Ubiquitous Intelligence and Computing (UIC 2006). pp.625-636.