My recent research into the throwing art of older karate came from my recent posts on Funakoshi Ginchin’s throwing techniques described in his “Karate Do Koyan” from 1935. Then with further research I found a good article ‘Throws in Karate’ by Charles Joseph Swift http://www.fightingarts.com/reading/article.php?id=77 on the same subject.
Then on the same topic there is the great translation b Mario McKenna of Itoman Seijin (Morinobu’s) book Toudi-jutsu no Kenkyu which describes these throws.
Back Riding Throw
Winding Neck Strike
Using the Oshima 1973 translation of the Funakoshi text he describes them as follows.”Throwing techniques include byobudaoshi, komange, kubiwa, katawaguruma, tsubamegaeshi, yaridama, tanitoshi udewa, sakatasuchi, and others.” (page 227) By comparing the descriptions of the throws from the books it seems there are some similarities and differences from those of Toudi and Karate.
It is unclear to me if these were shown as opening movements to the throws found in kata or as separate training practices complementing the arts of kata. Perhaps further research can clarify this for me. They seem to be logical training alternatives to karate.