The number 4 is believed to be associated with death and misfortune in Japanese culture, originating from the Chinese language where the pronunciation of "four" sounds similar to "death". This belief has had a significant impact on Japanese culture, with many buildings avoiding the fourth floor and gift-giving in sets of four considered bad luck. However, some regions consider the number 4 lucky as it can be pronounced similarly to "to exist" or "to live". While younger generations view this belief as an outdated superstition, it still affects business in Japan where companies may avoid using the number 4 in branding. Education has played a role in shaping attitudes towards this belief, and as Japan continues to modernize and become more globalized, it will be interesting to see how this belief evolves over time.