Japanese is nativeis (not) my first language/mother tongue/native language.. Japanese is (not) my first language/mother tongue/native language..

I can't tell if Japanese is your native language or not.

(Japanese is native.is my first language. / Japanese is my mother tongue. / I'm a native Japanese speaker.) (Japanese is my first language. / Japanese is my mother tongue. / I'm a native Japanese speaker.)

Japanese is my native language. Japanese is my native language.

I wasn’t sure what you were trying to say here. I hope I interpreted it correctly.

It is not perfaect, but noI don't encounter any problems. It is not perfect, but I don't encounter any problems.

It'm not perfact but no problemect at it but it's fine. I'm not perfect at it but it's fine.

It is not perfaect, but it is no problem. It is not perfect, but it is no problem.

However, it dicreasedmy ability to write Japanese on paper has decreased. However, my ability to write Japanese on paper has decreased.

However, it dicreasedI've had fewer and fewer opportunities to write Japanese on paper. However, I've had fewer and fewer opportunities to write Japanese on paper.

However, it dicreasedmy ability to write Japanese on paper has decreased. However, my ability to write Japanese on paper has decreased.

So, I often forget Kkanji. So, I often forget kanji.

So, I often forget Kkanji. So, I often forget kanji.