she needs a right handed lover to start playing with her left tit more so they'll even out. Also interesting that most women tits are bigger over where the heart is located.
As I mentioned in another thread, the asymetry of her breasts is noticeable only because her breasts are so large. As 3d noted, most women have the larger boob on their left-hand side, so that way Ms Tanaka is unusual.
By the way, in case you're curious, check your balls. There's a 90% likelihood that the left-hand one is slightly larger and hangs lower. If you ever wondered why, imagine trying to walk with them exactly equal.