Blue Jays assistant general manager Andrew Tinnish and pro scout Danny Evans were in Japan in August, scouting pitcher Masahiro Tanaka, according to Bob Elliott of the Toronto Sun.
In seven seasons with the Rakuten Golden Eagles, the 24-year-old has walked 270 and struck out 1,210 in 1,284 innings pitched.
He is currently 20-0 with a 1.24 ERA in 23 starts this season with the Golden Eagles.