The veteran who was adjuged to have lost in her pre-quarterfinal (51 kg) bout on Thursday has slammed the IOC's Boxing Task Force.
India's big hope P V Sindhu will take on home favourite Akane Yamaguch for a place in the women's singles semifinals.
Keralite Sajan clocked 53.45s to finish second behind Abeku Jackson of Ghana (53.39s) in his heat in in 100m butterfly.
The 2012 London Olympics bronze medallist lost 2-3 to Colombia's Ingrit Valencia.
Swedish world record-holder Armand Duplantis told reporters at a press conference on Thursday that he had not been in contact with his American rival Kendricks.
Kumar scored a comprehensive win against Ricardo Brown of Jamaica in the men's super-heavyweight round of 16 bout.
Atanu Das will next meet Takaharu Furukawa of Japan on Saturday for a place in the quarterfinals of the individual competition.
Rio Games silver medallist Sindhu is yet to drop a game at Tokyo 2020.
The 23-year-old, who finished runner-up to Canada's Margaret MacNeil in the 100m, touched the wall in 2:03.86, well ahead of the US pair Regan Smith and Hali Flickinger, to win China's first swimming gold of the Games.
The Indian number one had earlier seen off a tough challenge from Chinese Taipei's Deng Yu-Cheng in a five-setter to move into round two.