1, is the uncle's annual income filled in when you applied for residence status consistent with the 80,000 you are filling in now? The economic payer of exchange students can earn 80 thousand a year.
2. If it is the same, you must tell your uncle that his annual income is 80,000, and ask him to name the telephone receiver on the employment certificate. Don't give ambiguous answers when conducting telephone survey.
Generally speaking, it is normal to have only parents and children in the household registration book, which will not give people the feeling of poor family conditions. Moreover, students studying in Japan are mainly working-class, and their family conditions are generally normal. In addition, your economic payer is your uncle, and your uncle's household registration book should also be submitted. There is no problem that the service location on the household registration book is either blank or consistent with the name of the unit on the employment certificate.
It takes 3 to 7 working days to change the visa. Pay attention to the investigation call from the embassy. It will be easier to sign the exchange student visa, so don't be too nervous.