Hiroki was born, raised and nurtured in Japan during his youth. In his master and Ph.D, he worked on quantum optics involving squeezed light, Schrödinger’s kittens and tons of optical mirrors. After that he decided to try his luck in the United Kingdom where he also started new research about ion trapping and cavity QED. After turbulent but enjoyable eight and half years in the UK, he returned to Japan in one piece. Then at University of Tokyo he experienced research using superconducting Josephson circuits. Upon joining OIST, he switched his research subject back to the more experienced ion trapping with good memory of transmon qubits in his mind.