The Flowery Keiji) is a Japanese period manga series, based on the novel Ichi-Mu-An Fūryūki by Keiichiro Ryu and illustrated by Tetsuo Hara.

Hana no Keiji is one of best-selling Weekly Shōnen Jump manga series of all time, with over 17 million copies in circulation.

Hana no Keiji is based on the novel Ichi-Mu-An Fūryūki (一夢庵風流記) by Keiichiro Ryu and illustrated by Tetsuo Hara.

Naoe Kanetsugu -Maeda Keiji Tsuki-gatari-, written by Tetsuo Hara and Nobuhiko Horie and illustrated by Yuji Takemura, began serialization in Shinchosha's Weekly Comic Bunch on November 7.

Naoe Kanetsugu -Maeda Keiji Sake-gatari started in the brand new magazine Monthly Comic Zenon by Tokuma Shoten on October 25, 2010.

Naoe Kanetsugu -Maeda Keiji Hana-gatari, written by Hara and Horie and illustrated by Masato Deguchi, was published in the May issue of Monthly Comic Zenon on March 24, 2014.

Naoe Kanetsugu -Maeda Keiji Sake-gatari has been adapted into an anime television series aired on TV Tokyo on July 2, 2013, entitled Gifū Dōdō!!