Simplify the following text for a Grade 7 native English-speaking person.
Original: Following the change , Horio Yoshiharu decides to move to build Matsue Castle instead of Gassan-Toda , and soon after Yoshiharu 's death the castle is completed .
Simplified: Horio Yoshiharu decided to move and build Matsue Castle instead of Gassan-Toda . The castle was completed soon after Yoshiharu 's death .