Portrait of William Joo
i. Biography
William Joo is the chef-owner and co-founder of Pizzeria Sei, a Tokyo-influenced Neapolitan pizzeria that opened in Pico-Robertson, Los Angeles, in 2022 and later expanded to a larger Palms location in 2026. Coverage describes him as a Korean-born chef who moved to Los Angeles as a teenager and developed Pizzeria Sei with his wife and business partner Jennifer So. Pizzeria Sei has earned international attention through major pizza rankings and reviews, including recognition from 50 Top Pizza and Michelin Guide coverage noted in press reports.
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