These graves are all from the Ushiku Joen, the cemetery around the Ushiku Daibutsu.
As far as I know, “One Piece” is a manga about pirates and has nothing to do with volleyball. If anyone has an explanation for this, put it in the comments, please.
An English tombstone tells the world that you’re international, even in death.
The hollow section are where the ashes go.
In case you can’t see them clearly, the white sticks are ski poles.
It says: Let’s go for a walk – anytime.
I assume this is meant to be an inspirational quote rather than a cynical view of inheritances.