Japanese tend not to eat while walking along or standing around on the street. However, it is acceptable to drink while standing aside a vending machine. Eating and drinking on local trains, but not long distance express trains, is also frowned upon.
Many Japanese people believe it is poor manners to walk or do other physical activities while eating because it means you're not appreciating your food properly. For some, this belief has its roots in World War II, when food was scarce and it was something to be treasured, not treated casually.
Expect to carry your trash with you. Eating while walking is considered bad mannered. Sit down or at least stand in a place away from pedestrian traffic when enjoying a meal or snack.
Blowing your nose at the table, burping and audible munching are considered bad manners in Japan. On the other hand, it is considered good style to empty your dishes to the last grain of rice.
If you're walking inside your home while eating a plate of food, then yes it is considered rude, especially if there are guests in your home because you are supposed to be polite and respectful towards your houseguests and walking while eating instead of eating at the dining table is bad ettiequte.
Japanese tend not to eat while walking along or standing around on the street. However, it is acceptable to drink while standing aside a vending machine. Eating and drinking on local trains, but not long distance express trains, is also frowned upon.
Always finish your meal!
The Japanese consider it rude to leave food on your plate, and even more so to order more food when you haven't finished everything you've already got. This is related to one of the fundamental concepts in Japanese culture, mottainai, which is a feeling of regret at having wasted something.
Pointing at people or things is considered rude in Japan. Instead of using a finger to point at something, the Japanese use a hand to gently wave at what they would like to indicate. When referring to themselves, people will use their forefinger to touch their nose instead of pointing at themselves.
Pointing at people or things is considered rude in Japan. Instead of using a finger to point at something, the Japanese use a hand to gently wave at what they would like to indicate. When referring to themselves, people will use their forefinger to touch their nose instead of pointing at themselves.
In Japan, crossing one's legs is seen as disrespectful. It is because when you do this you show the bottom of your feet to guests, and since they have picked up dirt, you are showing that dirt to your guests.
Avoid things like tank tops, shorts, and mini-skirts. Opting for more conservative clothing is always a safe bet even if you don't plan to visit temples or shrines. It's also generally frowned upon for women to show cleavage. Clothing with offensive messages or designs.
Eating while walking is a big no-no for most Japanese–even children enjoying an ice cream are often told to sit down before consuming food.
Prolonged eye contact (staring) is considered rude. Don't show affection, such as hugging or shoulder slapping, in public. Never beckon with your forefinger. The Japanese extend their right arm out in front, bending the wrist down, waving fingers.
Note: It is very rare for anyone to acknowledge a sneeze in Japan, and it is customary not to say anything at all. After multiple sneezes, they use these words. "Are you all right?" "Sorry." or "Excuse me."
Society and culture
For example, a burping guest can be a sign to the host that the meal satisfied them and they are full. In Japan, burping during a meal is considered bad manners. Burping during a meal is also considered unacceptable in Western cultures, such as North America and Europe.
Instead, you may bring the bowl close to your mouth and drink it. For soup served in larger bowls — often containing noodles such as ramen, soba and udon — use the spoon provided for the broth. When eating the noodles, slurp away! Loud slurping may be rude in the U.S., but in Japan it is considered rude not to slurp.
Bowing is an essential part of Japanese custom to show respect, thanking, greeting or apology. In stead of shaking hands, we bow, and it depends on time and people how long and deep you bow.
Unlike Europe and the U.S., there is no culture in Japan in which sunglasses are worn on a daily basis, and Japanese people are not familiar with wearing sunglasses.
Loud chatter or behavior is usually frowned upon because it invades others' space. Avoid talking on the phone (put it on silent) and send messages instead.
It's considered rude to leave food on your plate after you're done, especially when having asked for a second serving, so it's best to request the exact amount you would like to eat.
Don't leave food behind. It's considered bad manners to leave even grains of rice behind, so be sure to clean your plate! If there are some foods you cannot eat, ask to have them left out of the dish. Do use the opposite end of chopsticks to pick up food from a shared dish.
Rice is sacred in Japan and leaving uneaten rice or even morsels of rice in a rice bowl are frowned upon. While visitors will be forgiven, if you don't plan to finish your rice, ask for small portions, decline rice or make an effort to eat every rice morsel.