On Analytics Reports, it is not possible to analyze the details of (not provided). However, if you register for the separate SEO Keyword Analysis Report (5,000 yen/month), the report will show the details of the inflow keywords of the past month.
SEO Keyword Analysis Reports use data from Search Consoles. For details on this report, please see the Report Manual.
Also, we have provided sample SEO Keyword Analysis Reports which can be downloaded for free from here, so please see that as well.