The sweetened chomi-umeboshi are relatively new (having emerged after the war), and a difference in preferred umeboshi is growing between the elderly and the young, who are used to eating different kinds of umeboshi.
甘く調味された調味梅干は比較的新しく(戦後生まれである)、お年寄りと若者とで食べ慣れた梅干しが異なるので、梅干の好みに差が広がっている。