Sara Takatsuki (高月 彩良 , Takatsuki Sara , born 10 August 1997) is a Japanese actress, model and singer born in Kanagawa, Japan. She is represented by the agency Sweet Power. She began her career in 2008. She belonged to bump.y Japanese singer group in the past.
Kanagawa is smaller in area and population than Japan.
The text says the actress was born in Kanagawa, Japan, so we know Kanagawa is a place IN Japan, therefore Japan is bigger [in area and population]. The algorithm might not understand the implication of 'place within place'.