週刊ヤングサンデー
is a Japanese seinen manga series about Japanese calligraphy, written by Katsutoshi Kawai. It began serialization in "Weekly Young Sunday", later moving to "Big Comic Spirits" due to the cancellation of the former. It was nominated for best manga at the first two Manga Taisho. A live action television series adaptation was broadcast on NHK in 2010, with Aki Asakura in the lead role.