[Hyakushi]

Our minds don't expire like a carton of milk, only if you let them.

Although we do have a "Good Before" date which is mainly around 10-12 years old but after that you can still learn any language but you just wont have that sharpness like you use to.
Keep at it and don't get lazy, do you talk in japanese everyday?.
To family members, your pets, when ever your by yourself, when ever.
Its alot harder if you go On and Off, because you can't go a year with out talking it and expect it to come back to you with out using it everyday.