Simplify the following text for a Grade 10 native English-speaking person.
Original: In 1830 , less than a decade after Harunori 's death , Yonezawa was officially declared by the shogunate to be a paragon of a well-governed domain .
Simplified: In 1830 , less than a decade after Harunori 's death , the shogunate said that Yonezawa was a paragon of a well-governed domain .