I spent over a decade building optimization systems as a software engineer. I collected data, assigned scores, and called it progress. Then the same logic entered my body.

After years of fertility treatment, I watched life become a spreadsheet. Eggs counted, embryos graded, genetic tests that say pass or fail. IVF saved me. I love it. But something was broken. All of that is true at the same time.

My work makes visible the contradictions that technology produces, especially in spaces where those contradictions are felt in the body but rarely spoken. I use 3D printing, edible materials, living organisms, sensors, and code to create participatory installations that can only be received through physical experience.

In 18/5/3, a cake is cut into eighteen slices, one for each fertilized egg. Five are 3D-printed into form. Three glow. Two stay dark. Thirteen never made it to the plate. In If I Could Grow You, a moss terrarium gives slow, cyclical time to what the algorithm labeled failure.

I have always worked from the inside. Inside the tech industry, I saw how scoring logic decides who is valued and who disappears, so I built communities for women engineers and gender minorities. Inside fertility treatment, I felt the same logic on my own body, so I started making work.

Because I love technology, I have to question it.

Riho Hagi is a feminist technologist and artist based in New York City, originally from Ishikawa, Japan. She holds an MPS from New York University's Interactive Telecommunications Program (ITP) and an MS in Computer Science from Nara Women's University. With over a decade as a fullstack engineer at Rakuten and ZOZO, she works at the intersection of code, the body, and lived experience. Her current project, Algorithmic Pregnancy, examines how fertility treatment transforms pregnancy into an optimization process. She has exhibited at Eyebeam, NYC Resistor, Harvestworks on Governors Island, and NYU ITP, with a permanent installation at TOKIODELIC in SoHo. Driven by her awareness of gender inequality in tech, she founded Japan's first women engineers conference (with Google), dots girls, and mochi mochi dev, an award-winning gender-minority Web3 collective.

• 2025 - PresentTOKIODELIC, SoHo, New York (permanent installation)
• 2025TENTENTEN, SoHo, New York
• 2024Show One Thing, NYU ITP
• 2024Spring Show, NYU ITP
• 2023The Democracy Machine, Eyebeam
• 2023Show One Thing, NYU ITP
• 2023NYC Resistor
• 2023Spring Show, NYU ITP
• 2023Regen Circuit, Harvestworks, Governors Island
• 2022Winter Show, NYU ITP

• 2023ETH Global NYC, Winner
• 2023Mammothon, Winner

• 2023 - Presentmochi mochi dev, gender-minority Web3 collective
• 2018Women Engineers Conference, Japan, Founder & Organizer (with Google)
• 2016dots girls, gender-minority software engineer community

• 2024Wave Career, Tokyo
• 2024Waffle College, Tokyo
• 2023Women Tech Terrace, Abema Towers, Tokyo
• 2023Denenchofu High School, Tokyo
• 2022Waffle Camp, Yokohama
• 2022Waffle Camp, Fukui
• 2021Seisho Kaichi Junior and Senior High School, Tottori

• 2023 - 2024Mentor & Instructor, Waffle
• 2024Technovation Girls, Art/Web Development Instructor
• 2018Rails Girls, Workshop Organizer, Tokyo

• 2024brass, Interview on Wave Career
• 2023Experiments Never Fail, Interview on Waffle College
• 2022Interview on "watashi×IT＝saikyosetsu" [ISBN: 9784898155707]
• 2022Floating, Essay on note.com