Lennon has previously spoken highly of Yamada, telling the Daily Record last month: "He can play left side or off the striker. He looks okay but we'll not have a real idea until we've seen him over here.
"I don't think there would be any money involved - he's a free."
Yamada has been with Jubilo since 2011 and has also represented Japan on two occasions, both which occurred this year.
For breaking stories and all the great banter like us on Facebook: facebook.com/tribalfootball