More than 60 percent of respondents to an NHK poll think Afghanistan will likely revert to a hotbed of international terrorism.
NHK conducted the telephone survey over the weekend. More than 1,200 people responded.
The Taliban seized power in Afghanistan last month as US troops were preparing to pull out. The US military announced the completion of the withdrawal at the end of last month.
Asked whether they think Afghanistan could become a terror hotbed again, 63 percent of the respondents said it is likely, while four percent said it is unlikely. Twenty-five percent said they cannot say which.
The respondents were also asked about the recent Tokyo Olympics and Paralympics. Organizers staged the Games in the hopes of deepening understanding of a diverse society.
Five percent said understanding will deepen significantly, while 47 percent said it will deepen to some extent. Thirty-seven percent said it won't deepen so much, and six percent said it won't deepen at all.