No, originally Randori no Kata was apparently an intermediate step developed to show the major techniques and rationalize them between multiple jujutsu schools. I wrote this entry that addresses it in Joe Svinth's 'Martial Arts of the World.'
http://books.google.co.jp/books?id=P...20kata&f=false
Note that even then there were other, more dangerous randori techniques still taught and available, but having a common curriculum meant that Kano as the jujutsu group chair could present a unified front to present to the Ministry of Education, as the entire group accepted Kano's proposal for Randori no Kata. The attempt to coordinate a combatives kata, for which Kano offered what is today the Kodokan Kime no Kata (which Kano called the basis of all judo!) was a bust - the schools varied much more, some punched and kicked a lot, some wanted different or no weapons, and had hundreds of years of history and pride to back their offerings.
Those more dangerous techniques were eliminated over time in order to get judo accepted into the school system. But you see the remaining leglocks in the kata only - they are not used in randori or competition.
Other legitimate judo techniques such as double leg takedowns have more recently been banned (or highly restricted - you can't directly attack the legs but can after an engagement....).
So, one way to think of it is:
- judo has a large number of formal techniques, and tons of informal techniques and modified techniques. This traditionally includes kicks, strikes, finger and wrist (very old) techniques. These can be practiced but seldom are outside kata or the occasional self defense drills.
- A smaller number can be used in randori.
- And an even smaller number can be used in competitions.
- Juniors are further restricted in competition, can't use chokes and joint locks.
Don't worry about it too much - no one understands this completely today - while some details are known, other historic details have been lost (specific dates and full original curricula, logic, alternatives considered).
L Gatling