Some people say the 'thick type' for 'Ten-ichi' is more a unique dish rather than ramen, but it can be considered to be have evolved from the thick type of conventional Kyoto ramen considering the historical background and the way in which the taste was formed.
「天一」の「こってり」はラーメンと言うより独自の食べ物という人もいるが、歴史的な流れや、味の形成過程を見る限り、旧来の京都ラーメンのこってり系の発展系と考えられる。