It may be no exaggeration to say that dishes created in Edo such as Sushi, Soba (Japanese wheat noodles), Kabayaki (grilled dish with sweetened soy-sauce), Tenpura (deep-fried vegetables and fish with seasoned coating) would not exist without the invention of koikuchi soy-sauce.
寿司、蕎麦、蒲焼、天ぷらといった江戸で生まれた料理は濃口醤油の誕生なくしては存在していなかったと言っても過言ではない。