It belongs to the Dai ikkyo (第一教, first taught group) of the Gokyo-no-waza (五教之技, five teachings of techniques), of Kodokan Judo.

[1] In this technique, kuzushi (崩し, the balance break) is to uke's front.

Kake (掛け, the execution of the throw) involves tori lifting with the hips and bending forward while continuing the pull to the front and down, bringing uke onto the mat at tori's feet.

[1][2][3][4] O-goshi is known to have existed in the Tenjin Shinyō-ryū traditional school (koryū) of jujutsu, which Jigoro Kano studied prior to founding judo.

[5] In the revised 1920 Gokyo-no-waza, the throw was moved to the Dai ikkyo (第一教, first taught group) where it remains.