His reason for wanting to leave the party was because of its policy on security and amending the Constitution .
In August 2017 , Hosono left the Democratic Party , the successor of the DPJ , with the intention to form his own political party .
Hosono 's reason for wanting to leave the party was because of its policy on security and amending the Constitution .
In August 2017 , Hosono left the Democratic Party , the successor of the DPJ , with the intention to form his own political party .