As a result of diffussion, which culture aspects were shared in asia?

Asia is the birthplace of many religions such as Buddhism, Christianity, Confucianism, Hinduism, Islam, Jainism, Judaism, Shintoism, Sikhism, Taoism, and Zoroastrianism. All major religious traditions are practiced in the region and new forms are constantly emerging.

the world may never know

the fact that could also be added to column b is that during world war ii, specifically between the years 1941 and 1945, japan expanded its territory towards the indonesian territory in what was known later as part of the "pacific war". in that time, japan could conquer the philipines, singapore,   borneo, central java, malang, cebu, sumatra and various other islands of the area, therefore expanding its territory for a brief period of time.