The legal drinking age in Japan is 20 years old. This means that individuals must be at least 20 years old to purchase and consume alcohol in Japan. The legal age was set at 20 in 1922 and has remained the same ever since, although there have been discussions about potentially lowering it in recent years.

It is important to note that underage drinking is still a problem in Japan, as it is in many other countries around the world. While the legal drinking age is 20, many minors are able to access alcohol through friends, family members, or illegal sales. In an effort to combat underage drinking, Japan has implemented a number of laws and regulations to enforce the legal drinking age and reduce access to alcohol for minors.
For example, it is illegal in Japan to sell or provide alcohol to anyone under the age of 20. Additionally, establishments that serve alcohol are required to check the age of their customers and refuse service to anyone who is underage. There are also strict penalties for individuals who are caught selling alcohol to minors or allowing them to consume alcohol on their premises.
Despite these regulations, underage drinking remains a concern in Japan. According to a 2019 survey by the Ministry of Health, Labor, and Welfare, nearly 20% of high school students reported having consumed alcohol in the past month. This is down from previous years, but it still highlights the need for continued efforts to reduce underage drinking.
It is also worth noting that Japan has a relatively relaxed attitude towards alcohol compared to some other countries. While there are laws in place to regulate alcohol consumption and sales, alcohol is often consumed in social settings and is a common part of Japanese culture. In fact, Japan is known for its sake, a traditional alcoholic beverage made from fermented rice, which has been produced in the country for over a thousand years.
In addition to sake, Japan also has a vibrant beer culture, with many popular domestic and international beer brands available. Other alcoholic beverages commonly consumed in Japan include shochu, a distilled spirit made from various ingredients such as sweet potatoes, barley, or rice, and umeshu, a sweet plum wine.
In summary, the legal drinking age in Japan is 20 years old, and underage drinking is prohibited by law. While Japan has implemented regulations and penalties to enforce the legal drinking age, underage drinking remains a concern. Additionally, Japan has a rich culture of alcohol consumption, with sake, beer, shochu, and umeshu among the popular beverages enjoyed by many.