According to one source, the Nationals have scouted Wada "a lot" this past season and "the team considers him an option." The 30-year-old has played his entire career with the Fukuoka Softbank Hawks, going 16-5 with a 1.51 ERA this past season.
Wada will officially become a free agent on Dec. 1.
Wada, who is often compared to left-hander Jamie Moyer, started Game 1 of the Pacific League Championship Series against Seibu. He pitched seven innings, allowed only one run and became the winning pitcher in a 4-2 victory. He finished the season with 30 2/3 consecutive scoreless innings.
Calls to agent Alan Nero and Nationals general Mike Rizzo were not returned.
Bill Ladson is a reporter for MLB.com and writes an MLBlog, All Nats All the time. He also could be found on Twitter @WashingNats. This story was not subject to the approval of Major League Baseball or its clubs.