Final answer:
Several scholars, including Ruth Benedict and Masuda & Nisbett have researched the cultural differences between Japan and the USA.
Step-by-step explanation:
In the research on cultural differences between Japan and the USA (Theory Z), several scholars have contributed to our understanding. Ruth Benedict, an anthropologist, wrote a book called The Chrysanthemum and the Sword that describes Japanese culture, but her conclusions have faced criticism for relying on a limited number of informants. Masuda and Nisbett (2001) published a study comparing the context sensitivity of Japanese and American participants, while Rothbaum et al. (2000) explored attachment and culture in the United States and Japan. These studies shed light on the cultural differences between Japan and the USA.