...Shunsuke Watanabe's new pitch, the furyu (風立ボール), is apparently a change / screwball / sinker. He picked up the pitch while he worked out at Tanegashima in January. He apparently got the idea to call the pitch furyu after seeing a sign that said all good horses will stand facing into the wind. The pitch apparently represents his own desire to face adversity straight on and win. The kanji for furyu uses two characters: 風 means wind and 立 means to stand. So the word itself quite literally means to stand in the wind.
If you can read Japanese, he has posted an explanation at his official blog.
After his start on Sunday, Watanabe also told reporters that he felt confident about all his pitches.