He previously struggled to answer simple questions about the Tokyo 2020 Olympic and Paralympic Games.
The New York Times reports lawmakers there were "aghast" Wednesday when, during a parliamentary questioning session, 68-year-old Yoshitaka Sakurada admitted he doesn't do any work on a computer, because that's what he has secretaries or other workers for.
"It's shocking to me that someone who hasn't even touched computers is responsible for dealing with cybersecurity policies", Imai said.
Another joked that perhaps Sakurada was simply engaged in his own kind of cybersecurity.
He also made comments showing he has no idea what a USB port is. If you never use a computer, you can't get hacked, right?
Sakurada did not appear to know what they were, the Japan Times noted.
"This is not something I should be meddling in in my capacity", he said, according to the Asahi newspaper.
He went on to answer a question about the use of USB sticks in Japan's nuclear facilities, a potential means of infecting systems with malware.
Sakurada has been in office just over a month, after being appointed in a cabinet reshuffle following Prime Minister Shinzo Abe's reelection as head of his political party.
Japan's cybersecurity and Olympic minister Yoshitaka Sakurada.
When asked by a lawmaker how someone lacking computer skills could be in charge of cybersecurity, Sakurada said policy was decided broadly by a number of people in his office and the national government, and he was confident there would be no problems.
The Shimbun noted that Sakurada is known for his "baffling replies", and has been forced to apologize for several sub-par performances in front of colleagues.
His comments were met with incredulity by opposition lawmakers. Before and during World War II, many Koreans who are now known as comfort women were forced into sexual slavery by Japan's Imperial Army.