Yuichiro Katsumoto is a Japanese gadget maker based in Singapore. He studied a video production and an interaction design at Keio university with his strong interest in time, play, and new media. And, he keeps inventing new electronic toys and interfaces since his student days. Currently, he works for the Smart Systems Institute, National University of Singapore as a senior research fellow.

His early work, Amagatana, is an umbrella for enjoying a blissful walk after a rain. After the sky clears up and the umbrella has served its purpose, we often swing around our umbrellas on a whim. By augmenting such motions with the sounds of clashing swords, Amagatana transforms scenes of everyday city life (i.e. The walk home from a train station) into subjective game-like arenas. Amagatana won the encouragement award at the 10th Japan Media Arts Festival Entertainment Division. This work was exhibited at FILE 2007 Games, Ars Electronica Festival 2007, ACM SIGGRAPH Asia 2008 Art Gallery, and several galleries and events around the world.

After moving to Singapore in 2010, he started a project "Phase Transition-ish Apparatus (PTA)" aimed at inventing various types of toys inspired by phase transition phenomena. Ninja Track (2011–2013), one of the examples of PTA, is the novel interface which is able to change its shape and flexibility according to digital contents. PTA won the excellence prize in the 15th Japan Media Arts Festival and James Dyson Award 2012 Regional Judging, and the game called ReelBlade which uses Ninja Track as a game controller also won the best technological award at the Tokyo Game Show 2015 SOWN.

Since 2013, he has been focused on a project that designs robot as an expression tool such as Dancer-in-a-Box (2013–2015) and Robotype (2016–). In 2017, he started making Buddha statues for praying once-loved technologies and media such as CD Prayer, besides previous academic/design oriented projects.