According to a report by Tokyo Sports, forty-three-year-old Hitoki Iwase and forty-one-year-old Masahiro Araki are planning to retire at the end of the season. Both players are expected to remain in the organization, Iwase as a pitching coach and Araki as an infield/base coach. The Dragons could schedule a retirement game for Araki some time in March next year during an exhibition game at Nagoya Dome. Iwase’s retirement game will most likely come during the last home game of the season on September 30.
Source: Tokyo Sports 9/26/2018
[UPDATE @ 11:16pm]
Nikkan Sports, Daily Sports, and Sanspo have also posted reports about Iwase and Araki retiring after the season.