With constant wear, Akoya pearls (especially cheaper pearls with thin nacre) will eventually wear down. With proper care, Akoya pearls can be passed down. My grandmother passed down a strand to me that was pristine, but she always wiped them down after wearing them and stored them properly when not in use. You can still pass them down generation to generation, but there is always the chance that the pearl will lose a bit of its luster as the nacre thins.
Hanadama is Akoya, but it is the absolute top with the thickest nacre, most blemish free skin and highest luster. Mikimoto AAA pearls are Hanadama, but you can save thousands if you buy a non Miki Hanadama pearl. All Hanadama strands come with a certificate, FYI, which is a basic guarantee of minimum quality.
IMO the perfect pearl wardrobe is one of each! One Hanadama and one gem quality freshwater. I would wear the Hanadama on more special occasions and evenings out, and wear the freshwater on a daily basis.