SC相模原
Due to unfortunate withdrawal of Arte Takasaki, the previous season has featured only 17 teams, but for 2013 the league has brought the number of teams back to 18. After having another team (Sagawa Shiga) ceasing its operations and withdrawing after the season, the league has welcomed into its ranks two newcomers, SC Sagamihara and Fukushima United. Both clubs are looking forward to eventual J. League promotion, with Sagamihara holding the associate membership status, and Fukushima having applied for it in 2007, though unsuccessfully.