[4] By the age of 26, she registered with a temp agency and the Foreign Correspondents' Club of Japan, and engaged in overseas image checks, research, etc.

In October 2017, she took office as the Goodwill Ambassador to Japan for the Food and Agriculture Organization of the United Nations (FAO).

Takeshi Okada, the former coach of the Japan national football team, was his classmate in his elementary school days.

The Japan Times reported in January 2016 that NHK was considering making changes to the Close-Up Gendai program, which may include the removal of Kuniya as host.

[15] Kuniya's eventual departure from the program in April 2016 came amid media reports of political pressure being exerted on Japanese broadcasters,[16] criticism by visiting United Nations officials investigating freedom of expression[17] and a steep decline in Japan's international ranking of press freedom by Reporters Without Borders.