The PGA Tour will reportedly ban any players from the Japan Golf Tour who have already participated in LIV Golf Series events or choose to participate in LIV events during the 2022-23 series, according to Bob Harig of SI.com.
Per that report, "The move helps explain why all four of the Japanese players who competed in the last LIV Golf Invitational Series event in New Jersey are not in this week’s field outside of Boston."
Those players are Yuki Inamori, Ryosuke Kinoshita, Jinichiro Kozuma and Hideto Tanihara, who played in the July's LIV Golf Series event at the Trump Bedminster in New Jersey.