"K. Hikima,M. Tsujimoto,M. Takeuchi,Y. Kajikawa","Transition Analysis of Budgetary Allocation for Projects on Hydrogen-Related Technologies in Japan",,"Sustainability",,"Vol. 12","Issue 20",,2020,Oct.
"T. Ogawa,M. Takeuchi,Y. Kajikawa","Analysis of trends and emerging technologies in water electrolysis research based on a computational method: a comparison with fuel cell research",,"Sustainability",,"Vol. 10","Issue 2",,2018,Feb.
"T. Ogawa,M. Takeuchi,Y. Kajikawa","Comprehensive analysis of trends and emerging technologies in all types of fuel cells based on a computational method",,"Sustainability",,"Vol. 10","Issue 2",,2018,Feb.