I think officially the research is done by Riken who cooperate with Organ Technologies. tsuji is still the team leader of Riken and the project. if it had failed, he would have had to resign there too. I think that could also have reasons of interest that he is not allowed to work for both companies
Tsuji wrote that about a month ago
Dear Admin,
Thank you for your interest in our research. There was no updates because the lecture was for graduate school students aiming to get fundamental knowledge. For further information, please refer to our laboratory website for the latest news on the progress of our research projects. Our laboratory is striving to advance research with the aim of fulfilling the expectations to improve quality of life for many individuals. We thank you for your patience and continued support of our research activities.
Sincerely,
Takashi Tsuji
Laboratory for Organ Regeneration
RIKEN Center for Developmental Biology Research (BDR)