Note Chiba Sensei is attentive to where he steps relative to uke's foot. Note his use of the shikaku angle in taking uke's balance.
In this video Chiba Sensei relays a story about how the Shihonage technique of O'Sensei evolved after an encounter with a Judoka at a seminar. Video shared by aikipath on YouTube.
Recorded 2008. Uke in this video is Robert Savoca Sensei.
https://youtu.be/eC_Uctj1CyE