Even though the movie is not due out in theaters in Japan until February of next year promotion of Yamashita Tomohisa's Ashita no Joe movie has begun. So far there is a promo picture of Yamapi in character and on the official website for the movie they have a short 30 second trailer up for the film.
Tokyo Hive article. (English)
Ashita no Joe movie OHP. (Japanese)
Even though it's only a short clip and the promo photo available isn't the greatest of quality I still find it much easier to believe Yamapi as a boxer than I ever could Kamenashi Kazuya when he played on for the One Pound Gospel drama. But that's just my two cents.