
Lobby Shelf
2025The most inexpensive and capable package management system for apartments — hardware and software designed end-to-end.

About
Yuki Ishihara is an Informatics student at the University of Texas at Austin with a minor in Entrepreneurship, building at the intersection of hardware, software, and design under the brand Kizukai Tech™️. He has shipped Flutter apps used by 1,000+ concurrent users, designed and assembled a physical IoT shelf system, and led a 100-student team that sent a balloon into the stratosphere in collaboration with SONY — earning a National Excellence Award in the process. Originally from Nagoya, Japan, Yuki brings the precision of an engineer and the eye of a product designer to every layer of a system, from circuit board to interface.
Kizukai Tech™️ - Thoughtful infrastructure to the World

Selected Work
4 Projects

The most inexpensive and capable package management system for apartments — hardware and software designed end-to-end.





5+ Flutter apps built for school communities — from tournament managers to festival guides — serving 1,000+ concurrent users.

Sent a balloon to 30km altitude with 100 students and SONY — winning the National Excellence Award and Asahi Cultural Award.

Volunteer web designer for YOSHIの会 — a Japanese-American nonprofit advocating to end gun violence since 1992.