I think you might be referring to 腹八分 (harahachibu) which is the proverb that dictates that one should only eat until they are 80% full to maintain their figure and ensure that they don't overeat.
yes they do. Of the 95% of Japanese that eat three meals a day, most people consider dinner to be the most important. More than 80% of them usually have dinner at home with their families.
Japanese eat a variety of food such as noodle,sushi,sashimi,rice and meat.
By virtue of the fact that Japanese food is inherently Japanese, it would be fair to say that the people of Japan eat the most Japanese food.
taberu (to eat)
The verb, to eat, in Japanese is Taberu, which, in Kanji, is written食べる
The Japanese eat food such as rice, chicken, noodles and more
osetsu ryouri
When they are hungry.
It depends but most Japanese people eat with chopsticks, and spoons/forks for soup and desserts.
Nearly 80% of Japanese people live in urban areas.
They don't. It is a protected species.
of course all Japanese eat it