The speaker was passionate about collecting butterflies from elementary school to junior high school, and owned about 160 species of specimens at the time. When he was assigned to a university laboratory, his professor gave him the theme of purification and structure determination of insect peptide hormones. Since then, I have continued my research on insects for about 35 years. During that time, he has conducted his research while changing his methods along with the progress of science and technology. In this lecture, I would like to introduce the changes in the research content of life science through the insect research conducted by the speaker and look into the future.

　The science and technology of natural phenomena is overwhelmingly based on what we learn from nature. The speed of propagation of sound waves in water, the theory of refraction of sound waves, and the theory of measurement for measuring the depth of the ocean were all accumulated through actual experience in the ocean. Marine life has taught me how to use sound to capture underwater images, and how to understand physical properties. In the beginning, there were no assumptions in the ocean.

　We will introduce ion thrusters, pulsed plasma thrusters, and solid thrusters that are being researched and developed as propulsion systems for small satellites and spacecraft, as well as the current situation surrounding small satellites and propulsion systems.