I was born in Japan, was there till 10 moved to Australia, and got myself Australian citizenship (I was not born into two citizenships). Now I’m 20 wanting to move back to Japan and live there for a very long time if not life so I want my citizenship back (I still have the passport but technically I lost the citizenship when I applied and got my Australian citizenship).
For someone like me who was born with Japanese citizenship, is the process easier and shorter to get it back or do I need to go through the same long process as everyone else?