Basically, Shibuya area was virtually owned by the Tokyu Railway Group in the postware period, and all the major buildings and shopping centers were run by Tokyu. The aerial cableway that is in the photo you posted was run by Tokyu Department Store, according to the website. And Gotoh Planetarium was Tokyu-owned (Gotoh being the founder of the corporate group).
In those days, there was nothing like what Shibuya is today, so it was easy to find Chuken Hachiko...
The lower part of Dogenzaka was called "Koibumi Yokocho (love-letter writing street) because there were some people with English capability there who wrote love letters in English for Japanese women to send to their American GI lovers. (Okay, I must tell you that was before my time...)
All the stretch of land from around Seibu Department Store up to Parco and other shopping centers further up the slope leading to NHK had been developed by the Seibu Group--therefore, Tokyu Hands, Seibu, Parco, Loft and others that are or were affiliated to the Seibu Group.
I think that Shibuya's tranformation began with development by Seibu and opening of the first-ever Parco there (around 1970, I think). Until then, Shibuya was a sleepy town that was very dark after sundown.