Complex sentence: Nowadays, "" in Ehime Prefecture, Shikoku, southern Japan has changed primary-hands to his son, gradually since during the late 1980s, as he reached an advanced age.
Split into simpler sentences: Nowadays, "" in Ehime Prefecture, Shikoku, southern Japan has changed primary-hands to his son. This family succession happened gradually since during the late 1980s, as he reached an advanced age.