Jōō (貞応) was a Japanese era name after Jōkyū and before Gennin and spanned from 1222 to 1224. The reigning emperor was Go-Horikawa.

There is another era, from 1652 to 1655 with same pronunciation but different kanji (承応)

Change of Era

On the 13th day of the 4th month of Jōkyū 4 (1222), the era became Jōō ("Righteous Answer"?)

Events of the Jōō Era

• Jōō 2 (1223) - Regulations established concerning salaries for Jitō

Jo'o	1st	2nd	3rd
Gregorian	1222	1223	1224

ja:貞応