aww really?
12.2% is not by means horrible, but i think with the SMAP name, you would expect something at least near 15%. and the other castmates are somewhat popular too, like Mocomichi Hayami & Karina.
i watched Shingo's previous full drama, "薔薇のない花屋 (Bara no nai Hanaya)" and it averaged 18.6%. i definitely recommend the drama though. it's so heart-breaking.
cleverly written too.