This article explores the history and benefits of intermittent fasting (IF) in Japan. IF is an eating pattern that alternates between periods of eating and fasting, with popular protocols being 16/8 (16 hours of fasting followed by 8 hours of eating) and 5:2 (5 days of normal eating followed by 2 days restricted calorie intake). It has been practiced in Japan since ancient times due to its cultural beliefs about food and health but has recently become increasingly popular due to its potential health benefits such as weight loss and improved metabolic health. However there can be some challenges associated with IF including hunger pangs during the fasted state; difficulty maintaining a consistent schedule; difficulty getting enough nutrients; potential dehydration; increased risk for disordered eating behaviors etc.. Therefore careful consideration should be taken before beginning an IF program but if done properly it can have many positive effects on one’s overall wellbeing.