I'm berlysia, a web developer based in Japan with a particular focus on frontend technologies.

I advocate for vertical writing on the web through CSS, with a focus on promoting broader awareness and adoption of its specifications.

I’m a founding organizer of TSKaigi, a leading TypeScript conference in Japan.

I work at DWANGO Co., Ltd., focusing on educational projects such as ZEN Study, in association with N High School Group and ZEN University.