Just 150 coveted bowls of noodles—the world’s first Michelin-starred ramen—are served daily at this unassuming shop in Tokyo’s outskirts. Customers start lining up at 6 a.m. The Tsuta brand now has seven branches across Asia, but the Tokyo shop that launched an empire still retains its hole-in-the-wall character and, as shown by the daily presence of chef Yuki Onishi, remains very much at the heart of operations. —Suyin Haynes