Astronaut Satoshi Furukawa has been reprimanded by the Japan Aerospace Exploration Agency (JAXA) after it was discovered that data in a research project he oversaw was fabricated or altered.
"I keenly feel the responsibility for undermining trust. I sincerely apologize," Furukawa said at a press conference in Tokyo on Thursday.
The project aimed to examine how stress accumulates in the human body when ordinary people stay in a confined space for two weeks. Forty people participated in a total of five such experiments, conducted in 2016 and 2017.