✨ Best Answer ✨
First, it is using” in Japan” only if you are exchange or meet with foreigners.
Second, it should correct “How about”, you may say” How is your school life?” Since “How + verb + Subject”
“How about” is planning whether you do something.
Third, “while” is often used in “at the same time”,so it is no need to use.
For example: You are eating while I answer the question.