Simplify the following text for a Grade 7 native English-speaking person.
Original: The Iwami area was split in to 3 clans : The mining district ( direct control of the Shogunate ) , the Hamada clan and the Tsuwano clan .
Simplified: The mining district was under direct control of the Shogunate . The Hamada clan and the Tsuwano clan each controlled their own areas .