Thanks for writing about something I use but knew nothing about. By fluke I came across the vinegar in our local health food store in the POCONOS... just where you talked about skiing. I use it as an alternative to salt or soy and it imparts it own flavor for sure. I also use the plums for making the Onigiri. Bringing this information to light was a day maker for me. I appreciate you offering not only the plant information for both the plum tree but also the perilla and the food end of it, your information was a complete circle. Thanks !!
You're quite welcome, I'm glad you enjoyed it. I enjoyed learning about Umeboshi too, as I did the research. The P.mume plum trees must be beautiful to see in person, especially when in full bloom. Apparently they have fragrance too, unlike other plum tree blossoms.
Thanks for the very informative article. Ume are used quite often in rice balls here in Hawaii but it was so nice to learn more about them as usually the ume is bought in a jar in the store and we do not know the back ground of the food.