Short answers, pulled from the story.
Hinduism and Islam are the largest religions in Asia, each with approximately 1.2 to 1.3 billion adherents. Hinduism is concentrated mainly in South and Southeast Asia, while Islam holds majorities across large parts of South, Southeast, and Central Asia.
Asia is the birthplace of 11 major religions: Judaism, Hinduism, Taoism, Shintoism, Zoroastrianism, Buddhism, Jainism, Christianity, Islam, Sikhism, and the Baha'i Faith.
Guru Nanak Dev founded Sikhism, a monotheistic religion, in the 1500s. It originated in the Punjab region of the northern Indian subcontinent and now has about 30 million adherents worldwide.
Indonesia has the largest Muslim population in the world and is 86% Muslim. Pakistan is 97% Muslim, Bangladesh is 89% Muslim, and Malaysia is 65% Muslim.
According to a 2012 Pew Research Center survey, about 21.2% of Asia's population is religiously unaffiliated, including agnostics and atheists. The unaffiliated form the outright majority in North Korea (71%), Japan (57%), Hong Kong (56%), and mainland China (52%).
Shinto, known in Japanese as Kami-no-michi, is the largest religion in Japan, practiced by nearly 80% of the population. Surveys from 2006 and 2008 found that only 3% to 3.9% of Japan's population identify as members of Shinto sects.