Igor Rotenberg Igor Rotenberg Igor Rotenberg, () is a Russian billionaire businessman and the oldest son and heir to Arkady Rotenberg, Russian billionaire businessman and co-owner with brother Boris Rotenberg, of the SGM (Stroygazmontazh) group. The Rotenberg's are closely associated with Vladimir Putin. In October 2018, Igor Rotenberg's wealth is estimated to be $1.1 billion. Igor Rotenberg has been under United States sanctions since 6 April 2018. Igor is the majority shareholder in Gazprom Drilling. Igor Rotenberg was born on 9 September 1974 in Leningrad to Arkady Rotenberg. In 2002, he graduated from the Higher School of Privatization and Entrepreneurship () in
The Canon of Judo of Judo", does not contain this information. Furthermore, the original book was translated by K. Sugai whose translations were poor at best. (For example, "Or this is to throw him down by foot sweeping instant before his advanced-feet are fixed in order to change his position or break your balance.") The book gives a brief history of Jujutsu in Japan, and gives the lineage of Judo, referencing Jujutsu masters prior to Jigoro Kano. To show the early origins and continuous development of the martial arts in Japan, a long list of historical text sources, people, and schools and styles are