In 2018 season, he had no chance to play in the Pacific League. Fukuoka SoftBank Hawks offered Chatani a re-contract as a developmental player, but he declined.[3] On November 4, Hawks has released him.[4]
Chiba Lotte Marines
On January 23, 2019, Chiba Lotte Marines has signed with Chatani as a developmental squad player.[5]
In 2019 season, Chatani played in the Eastern League of NPB's minor leagues. On December 25, he signed a 5 million yen contract with the Chiba Lotte Marines as a registered player under control.[6]
In 2020 season, Chatani finished the regular season in 31 games with a batting average of .063, a one hit, a one stolen base.