Complex sentence: All over Japan the classical disciplines, of either type, are to be found in quite local areas of the countryside and are characteristically small in number and membership and have tended to be dominated by individuals of warrior ancestry, even into the present day.
Split into simpler sentences: All over Japan the classical disciplines, of either type, are to be found in quite local areas of the countryside. The classical disciplines are characteristically small in number and membership and have tended to be dominated by individuals of warrior ancestry, even into the present day.