Ring ni Kakero 1: Kage Dou-hen
Genres: Action, Sports
Type: TV, Episodes: 6
Aired: Apr 2, 2010 to Jun 17, 2010
Studio: Toei Animation
Source: Manga
Rating: PG-13 - Teens 13 or older
Synopsis:
After defeating Black Shaft's makeshift Team America, the Golden Japan Jr. team returns to training for the World Tournament that will be held in Tokyo. But during training the Shadow Clan, which uses boxing as an assassination technique, kidnaps Kiku in order to lure Ryuji and the others into a fight to see who's truly the better representatives of Japan's junior boxers.

(Source: ANN)