Answer:
In the 16th century, Japan entered a period of isolationism known as the "Sakoku" period, during which it closed its doors to almost all foreign contact. This period lasted for over two hundred years and had a significant impact on the development of Japanese society. During this time, Japan became more culturally homogenous, and its culture and traditions became more distinct from those of other cultures.
In the mid-19th century, Japan ended its isolation and began to rapidly modernize and adopt Western practices and technology. Known as the Meiji Restoration, this period of rapid modernization had a profound impact on Japanese society. Japan adopted a new constitution, established a democratic government, and rapidly industrialized, becoming one of the world's most advanced economies by the early 20th century.