Yoshiyasu Takefuji demos the speaker based on the technical principle of cricket’s chirp, and the power generator based on the principle of temperature difference. While none of the experts in the each field invented them, how we can expect the person who is an experts in Computer Science make these inventions? He unveils the keys; attitude of amateur as a free thinker, unconventional mind to failure, and passion for challenge.

translated by Ayano Saiki