Received: 27 July 2021
Accepted: 2 December 2021
First Online: 22 December 2021
: In subject experiments, the ethics committee for safety subjects it to an ethical review established by Cyber Media Center at Osaka University. From the Ethics Committee, we obtained approval for data use in this subject. Appropriate care was taken to avoid any psychological or physiological distress on the subject during the experiment.
: Not applicable.
: The authors declare that they have no competing interests.