Declared religious affiliation
The vast majority of Japanese people do not identify with any single religion, while routinely taking part in Shinto rites (shrine visits at New Year, weddings) and Buddhist rites (funerals, ancestor festivals), the two traditions having coexisted for centuries without excluding each other. Christianity, introduced by Portuguese missionaries in the 16th century and then brutally suppressed for more than two centuries, remains a minority faith but has left a lasting mark, especially around Nagasaki.
Global Attitudes Survey (Pew Research Center) survey · Adults (18 and over), self-identification
Source: Pew Research Center (via Wikipedia) · 2023Japanese religious statistics vary greatly depending on the method: the official counts of the Agency for Cultural Affairs, based on membership registers declared by shrines and temples, add up to about 70% "Shinto" and 70% "Buddhist" (a total well above 100%, because of overlapping, non-exclusive institutional affiliations), whereas individual self-identification surveys like this one show a majority of people saying they have no religion.