Have You Heard of Japan’s Finest Red Vinegar, Born in Onomichi? While rice vinegar is common for sushi, traditional Edo-style sushi used red vinegar (akazu). Today, premium red vinegar is made from sake lees aged for at least three years, giving the sushi rice a subtle reddish hue with rich aroma and umami. With over 440 years of history, Onomichi Zousu crafts pure red vinegar using 100% Hiroshima-grown sake lees, gaining high acclaim. Enhancing the best seafood from across Japan with this vinegar is Sushi Yakushido, an exclusive, reservation-only sushi spot serving just eight guests per night. This ultimate sushi tour offers a rare experience: Explore why Onomichi became a vinegar hub on a guided walk. Visit a historic vinegar brewery. Savor a premium sushi course with exquisite red vinegar. A journey into the heart of Japan’s sushi tradition, right in Onomichi.