IoT / HCI
Wireless charging sheets that can be cut with scissors, and 3D-printed water-soluble channels filled with liquid metal — fabrication methods that let anyone reshape an electronic device.
Once an electronic device is built, its shape is fixed. The best sensor position differs from person to person and from task to task, yet conductive stitching bonds a sensor permanently in place.
So the fabrication method itself is the research. A wireless charging sheet with H-tree wiring keeps working in whatever part remains after you cut it with scissors. Liquid metal poured into 3D-printed water-soluble channels can be recovered by dissolving the mould in water, with 98% recovered after four rebuild cycles. Machine knitting embeds power and communication buses into the fabric, and magnetically repositionable sensors let the layout be adjusted again and again.
Publications7
Journal1
A Cuttable Wireless Power Transfer Sheet
Proc. of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (ACM IMWUT), Vol.2, No.4, Article No. 190 (December 2018).
@article{Takahashi_2018,
title={A Cuttable Wireless Power Transfer Sheet},
volume={2},
ISSN={2474-9567},
url={http://dx.doi.org/10.1145/3287068},
DOI={10.1145/3287068},
number={4},
journal={Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies},
publisher={Association for Computing Machinery (ACM)},
author={Takahashi, Ryo and Sasatani, Takuya and Okuya, Fuminori and Narusue, Yoshiaki and Kawahara, Yoshihiro},
year={2018},
month=Dec,
pages={1–25}
}Conference4
Machine-knittable, Magnetically-Plug-n-Play E-Textile Prototyping
2026 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), To appear, Pittsburgh, USA (October 2026).
@inproceedings{li2026machineknittable,
title = {Machine-knittable, Magnetically-Plug-n-Play E-Textile Prototyping},
author = {Y. Li and R. Takahashi and W. Yukita and I. Wicaksono and K. Matsutani and Y. Iwamoto and S. Lee and T. Yokota and T. Someya and Y. Kawahara},
booktitle = {2026 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS)},
note = {To appear},
address = {Pittsburgh, USA},
year = {2026},
month = oct
}3D-printing water-soluble channels filled with liquid metal for recyclable and cuttable wireless power sheet
2026 IEEE 39th International Conference on Micro Electro Mechanical Systems (MEMS), VII-b-2, Salzburg, Austria (January 2026).
@inproceedings{Sato_2026,
title={3D-Printing Water-Soluble Channels Filled with Liquid Metal for Recyclable and Cuttable Wireless Power Sheet},
url={http://dx.doi.org/10.1109/mems64181.2026.11419301},
DOI={10.1109/mems64181.2026.11419301},
booktitle={2026 IEEE 39th International Conference on Micro Electro Mechanical Systems (MEMS)},
publisher={IEEE},
author={Sato, Takashi and Takahashi, Ryo and Yamagishi, Kento and Someya, Takao and Hashimoto, Michinao and Iwase, Eiji and Kawahara, Yoshihiro and Kurumida, Junya and Iwasaki, Wataru},
year={2026},
month=Jan,
pages={1–4}
}Plug-n-play e-knit: prototyping large-area e-textiles using machine-knitted magnetically-repositionable sensor networks
Proceedings of the Nineteenth International Conference on Tangible, Embedded, and Embodied Interaction (TEI '25), Article No. 56, pp. 1-7, Bordeaux, France (March 2025).
@inproceedings{Li_2025,
series={TEI ’25},
title={Plug-n-play e-knit: prototyping large-area e-textiles using machine-knitted magnetically-repositionable sensor networks},
url={http://dx.doi.org/10.1145/3689050.3705973},
DOI={10.1145/3689050.3705973},
booktitle={Proceedings of the Nineteenth International Conference on Tangible, Embedded, and Embodied Interaction},
publisher={ACM},
author={Li, Yifan and Takahashi, Ryo and Yukita, Wakako and Matsutani, Kanata and Caremel, Cedric and Iwamoto, Yuhiro and Lee, Sunghoon and Yokota, Tomoyuki and Someya, Takao and Kawahara, Yoshihiro},
year={2025},
month=Mar,
pages={1–7},
collection={TEI ’25}
}🏅PneuModule: Using Inflatable Pin Arrays for Reconfigurable Physical Controls on Pressure-Sensitive Touch Surfaces
Proceedings of the 2020 CHI Conference on Human Factors in Computing Systems (ACM CHI'20), pp. 1-14 (April 2020).
Honorable Mention Award
@inproceedings{Han_2020,
series={CHI ’20},
title={PneuModule: Using Inflatable Pin Arrays for Reconfigurable Physical Controls on Pressure-Sensitive Touch Surfaces},
url={http://dx.doi.org/10.1145/3313831.3376838},
DOI={10.1145/3313831.3376838},
booktitle={Proceedings of the 2020 CHI Conference on Human Factors in Computing Systems},
publisher={ACM},
author={Han, Changyo and Takahashi, Ryo and Yahagi, Yuchi and Naemura, Takeshi},
year={2020},
month=Apr,
pages={1–14},
collection={CHI ’20}
}Domestic2
液体金属を充填した3D印刷水溶性流路によるリサイクル可能なフレキシブル電子デバイス
第16回マイクロ・ナノ工学シンポジウム, 12P2-PN-92, 宇都宮 (November 2025).
ファイナリスト
@inproceedings{佐藤2025d,
title = {液体金属を充填した3D印刷水溶性流路によるリサイクル可能なフレキシブル電子デバイス},
author = {佐藤峻 and 高橋亮 and 山岸健人 and 染谷隆夫 and 橋本道尚 and 岩瀬英治 and 川原圭博 and 来見田淳也 and 岩﨑渉},
booktitle = {第16回マイクロ・ナノ工学シンポジウム},
note = {12P2-PN-92},
address = {宇都宮},
year = {2025},
month = nov
}切断により形状の変更が可能な無線電力伝送シートの設計の一検討
信学総大 2018, B-21-19, 東京, 日本 (March 2018).
@inproceedings{高橋2018x,
title = {切断により形状の変更が可能な無線電力伝送シートの設計の一検討},
author = {高橋亮 and 笹谷拓也 and 奥谷文徳 and 成末義哲 and 川原圭博},
booktitle = {信学総大 2018},
note = {B-21-19},
address = {東京, 日本},
year = {2018},
month = mar
}