His research interests cover many important fields of neurology especially in the mechanism of ischemic brain damage, gene and stem cell therapy, neuroprotection, and neuroimaging. He is the past president of the International Society of Cerebral Blood Flow and Metabolism (CBFM) and organized World CBFM meeting in Osaka in 2007 and Japan-Asia CBFM meeting Okayama city in 2014. He is currently serving Presidents of both Vas-Cog Japan and Vas-Cog Asia societies. He is also going to organize Japan Neurological Meeting in 2020, which is the world largest neurology meeting with more than 7,000 neurologists joining. Check the website of Vas-Cog Asia.