How did amino acids—the building blocks of life—form in the universe? To unravel this mystery, we need high-precision vibrational-rotational theory capable of accurately interpreting molecular spectra observed by telescopes and identifying molecules present in space. I am developing computational methods for calculating the “intramolecular tunneling effect” (Figure 1), which cannot be described based on the harmonic oscillator approximation or the rigid rotor approximation. Furthermore, by integrating rotation-vibration theory with reaction dynamics theory, I aim to construct a unified framework that can consistently handle both the reaction networks leading to the formation of amino acids and the prediction of interstellar spectra for the molecular species generated during these reactions. Once this research is complete, it will be possible to simulate the origins of life using a computer. Prior to joining Hokkaido University, I also conducted research exploring new physics beyond the Standard Model of particle physics based on relativistic quantum chemistry (Figs. 2–3).