After obtaining his Ph.D., Hibiki became an assistant professor at Research Reactor Institute,
Kyoto University in 1990, and was promoted to an associate professor in 1997. He was invited to be a full professor at School of Nuclear Engineering,
Purdue University in 2006, and became a professor emeritus in 2018,. Hibiki is currently a chair professor of thermal-fluid engineering at
City University of Hong Kong. The Hong Kong government granted a Global STEM Professorship to Hibiki. Hibiki first developed a high-time-resolution
neutron radiography technique using a steady thermal neutron beam in 1994. For this achievement he was awarded 1995 Promising Endeavor Award, from Atomic Energy Society of Japan. He published a research article on the basic constitutive equations for predicting mini-channel two-phase fluid dynamics in
International Journal of Multiphase Flow. These equations are known as Mishima-Hibiki equations and the paper is ranked No. 1 in citations for all papers published in
International Journal of Multiphase Flow since 1974 as of November 1, 2018. He developed the interfacial area transport equation known as Hibiki-Ishii equation, which has been implemented into a commercial computational fluid dynamics code. He also co-authored the book
Thermo-Fluid Dynamics of Two-Phase Flow. == Recognition and awards ==