The best way to enjoy umeboshi is with simple plain white rice in my opinion. Since I got a big pot of freshly made little shiso umeboshi from our neighbor (mine are big plums without shiso), I really wanted to try them. I prepared simple white rice, and to make it a dinner I added a little of ginger grilled pork and some little radishes grilles too.
The plum are just freshly pickled and in their juice to they are salty-sour-sweet, very tasty and melting in the mouth. Actually they are delicious without rice too and now I understand why a Japanese traditional snack for kid is umeboshi. There are so many ways to prepare them and so many ways to eat them!!