Among constitutional monarchies, Japan is likely to be supplanted as most populous by [[Thailand]] sometime during the twenty-first century. This is as a result of Japan's low [[birth rate]] (in part a result of the nation's early legalization of [[abortion]]) and lack of desire to expand [[immigration]] (Japan is the most ethnically [[homogeneous]] of the world's wealthy countries). Ironically, the relative prosperity of Thailand is in large part due to heavy aid and investment by Japan.
Historically Japanese government has shifted between no official religion, [[Shinto|Shintō]], and [[Buddhism]].<ref name="WebJapanFactSheet">[http://web-japan.org/factsheet/ Web Japan Fact Sheet], sponsored by the [http://www.mofa.go.jp/ Ministry of Foreign Affairs of Japan]</ref> Modern Japan has no state religion.<ref>Article 20 of the [[Current Constitution of Japan (Full Text)|Japanese Constitution]] erects a legal barrier between political and religious entities.</ref> An extreme interpretation of [[Shinto]] helped drive Japan's participation in [[World War II]]. As in other constitutional monarchies, political involvement of the emperor is limited by the constitution to ceremonial roles under the exclusive direction of the parliament, although symbolic gestures such as the annual wreath-laying ceremony at [[Yasukuni Shrine]] have occasionally antagonized Japan's neighbors. Most imported religions are practiced in Japan without interference, and [[Buddhism]] has been accepted by a large portion of the population. The percentage of Japanese who are Christian stands around 1%. <ref name="WebJapanFactSheet"/> <ref>Central Intelligence Agency, ''The World Fact Book'', [https://www.cia.gov/library/publications/the-world-factbook/geos/ja.html Japan]</ref> <ref>Encyclopædia Britannica, ''2006 World Fact Sheet'', Japan</ref> Japan has also spawned its share of [[cults]], including the exceptionally lethal but fortunately short-lived [[Aum Shinrikyo]] movement of the early 1990's, which in 1994 became the first non-state organization to kill people with [[nerve gas]].
[[Image:Cherry Blossom Japan.jpg|thumb|Cherry Blossoms and Fuji Yama]]
Historically Japanese government has shifted between no official religion, [[Shinto|Shintō]], and [[Buddhism]].<ref name="WebJapanFactSheet">[http://web-japan.org/factsheet/ Web Japan Fact Sheet], sponsored by the [http://www.mofa.go.jp/ Ministry of Foreign Affairs of Japan]</ref> Modern Japan has no state religion.<ref>Article 20 of the [[Current Constitution of Japan (Full Text)|Japanese Constitution]] erects a legal barrier between political and religious entities.</ref> An extreme interpretation of [[Shinto]] helped drive Japan's participation in [[World War II]]. As in other constitutional monarchies, political involvement of the emperor is limited by the constitution to ceremonial roles under the exclusive direction of the parliament, although symbolic gestures such as the annual wreath-laying ceremony at [[Yasukuni Shrine]] have occasionally antagonized Japan's neighbors. Most imported religions are practiced in Japan without interference, and [[Buddhism]] has been accepted by a large portion of the population. The percentage of Japanese who are Christian stands around 1%. <ref name="WebJapanFactSheet"/> <ref>Central Intelligence Agency, ''The World Fact Book'', [https://www.cia.gov/library/publications/the-world-factbook/geos/ja.html Japan]</ref> <ref>Encyclopædia Britannica, ''2006 World Fact Sheet'', Japan</ref> Japan has also spawned its share of [[cults]], including the exceptionally lethal but fortunately short-lived [[Aum Shinrikyo]] movement of the early 1990's, which in 1994 became the first non-state organization to kill people with [[nerve gas]].
The cherry blossom (Sakura) is Japan's unofficial national flower. It has been celebrated for many centuries and takes a very prominent position in Japanese culture. <ref>[http://www.japan-guide.com/e/e2011.html Cherry Blossom]</ref>