A guy named Kendall Shields wrote an interesting article on the gogo,
http://www.total-mma.com/2008/06/26/...the-gogoplata/
Here are a couple highlights in case you dont want to read it,
Heres a pic from Mikonosuke Kawaishi’s, My Method of Judo (”Exclusive! Masterful!”), published in 1955

Re: the gogo
"Somehow I didn’t realize until now that Kyuzo Mifune demonstrates (though does not name) this technique in his classic and essential The Canon of Judo (page 134, for those of you with the book). “Take extra care,” he cautions, “as it is easy to injure your opponent.”"
-Kendall Shields
http://www.total-mma.com/2008/06/26/...the-gogoplata/
Here are a couple highlights in case you dont want to read it,
Heres a pic from Mikonosuke Kawaishi’s, My Method of Judo (”Exclusive! Masterful!”), published in 1955

Re: the gogo
"Somehow I didn’t realize until now that Kyuzo Mifune demonstrates (though does not name) this technique in his classic and essential The Canon of Judo (page 134, for those of you with the book). “Take extra care,” he cautions, “as it is easy to injure your opponent.”"
-Kendall Shields