Hopefully moving to Okinawa

Hey all, so my family will be hopefully moving to Okinawa around mid to late August due to my wife’s job as a civil engineer for the army corps of engineers. We will begin under SOFA status and I will hopefully convince her to live stay permanently once we get settled m. Anyways we have to stay for at least two years and maximum of 5 I believe before being required to return to the states for some reason. So my question is: if we do end up wanting to live in Japan permanently want is it that we would need to do to facilitate that process.

Second we will also have two kids with personal interests in having another. We know we need to become fluent in Japanese and learn more about the culture than what is probably over exaggerated in the anime we watch. We probably can’t take her off SOFA due to the housing compensation we will get from her job but if I can begin working to account for that loss it may not be the thing that makes or breaks our wishes. Thanks you to anyone that can provide insight. And anything is missing context please let me know as I don’t know what maybe important or just useless information

by Eatvar