rank is a label, not a skill
your skill will transfer wherever you go, but your label may or may not transfer
if you put ferrari emblems on a rusted out chevy cavalier, it's still a rusted out chevy cavalier, and if you remove all the emblems from a ferrari, it's still a ferrari
you may find the best school available where you move is not aikikai, but even if you start out unranked at a shodokan or yoshinkan dojo, you will still have your skills learned from your current dojo
focus on the label that matters - college graduate!