Rikkai University Junior High Department or Rikkai Dai Fuzoku (私立立海大附属中学校 Shiritsu Rikkai Dai Fuzoku Chūgakkō), or the private school Rikkaidai is located in the Kanagawa prefecture and is considered to be the best team, having won the Japanese National Tournament for the last two years.
They aim for perfect wins in the matches and attempt to win for the third year in a row. They are introduced fully during the Kantō Tournament, where they easily crush Fudomine Middle School in the semi-finals. In the finals, however, they suffer a loss to Seigaku, and return to the Nationals as underdogs.
They make their way all the way through to the finals of the Nationals, but they are once again defeated by Seigaku, ending their hopes of winning a third straight title. Takeshi Konomi mentioned in an interview that he had originally not been sure who would be in the finals between Nagoya Seitoku and Rikkai, but he ultimately decided on Rikkai because he felt they were more interesting.
Rikkai is one of the few schools known to be a part of a junior high-university school system. It is also one of the few schools with a high school division.