You can search the name by enclosing it with slashes (/ /) in the Researcher Information field in the advanced search. This method will give you exact-match results for the researcher’s name.
For example, if you want the results for an exact match to ‘山田一太’, enter ‘/山田一太/’. In this way, it will not return the results for ‘山田一太郎’. For details, please refer to HELP page.