Tennis Association ♦ ATP ♦ Japan Tennis Association ♦ Kanto Tennis Association ♦ Kanagawa Tennis Association   Special Sponsor ♦ Suntory Limited ♦ Mizuno Corporation ♦ Tokyu Sports System Co.,Ltd.   Sponsor ♦ Enoteca Co., Ltd. ♦ Bridgestone Sports Co., Ltd.   Keio University ♦ Keio University ♦ Keio University Tennis Club ♦ The Keio University 150th Anniversary