Hello Folks. I need to write a letter to immigration office explaining the reasons I am applying for a permanent resident visa. I think this must be written in a formal way. How do I start the letter? What are the words I must use? What are the "挨拶" for that letter? how do I finish it?
Thanks a lot!

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@WagnerMinakawa
It's a very important document called "理由書". I recommend you to ask a consultant called "行政書士 ぎょうせいしょし". Of course without their help you can make it, but quite high technic required. (It doesn't have to be in Japanese, but if written in English, required Japanese translation.)

Basically it's same as a company interview. Who you are, family, academic history, carreer, income and how much can be contributed for the future. In addition, must be very clear the purpose of the reasons why get a permanent resident visa.

I hope you could find a good professional consultant. (If it's in Tokyo, much easier for you to find I guess.)