1/16-finals Hozumi E. Kozawa M. 2:0 (6:1, 6:0) details 22.05.2013 Semi-finals Hibino N. Kozawa M. 2:1 (6:1, 0:6, 6:2) details 14.09.2012 Quarter-finals Onishi K. Kozawa M. 1:2 (7:6, 2:6, 2:6) details 13.09.2012 1/8-finals Mori Y. Kozawa M. 1:2 (7:5, 4:6, 3:6) details 12.09.2012 1/16-finals Nakano Y. Kozawa M. 0:2 (1:6, 5:7) details 10.09.2012 1/8-finals Keir A. Kozawa M. 2:0 (6:3, 6:4) details 04.07.2012 1/16-finals Mutaguchi E. Kozawa M. 0:2 (3:6, 4:6) details 02.07.2012 1/8-finals Nunome C. Kozawa M. 2:0 (6:2, 6:3) details 27.06.2012 1/16-finals Wongteanchai Varu. Kozawa M. 1:2 (2:6, 6:1, 1:6) details 25.06.2012 1/8-finals Kowase M. Kozawa M. 2:1 (7:5, 3:6, 6:4) details 14.06.2012 1/16-finals Iha K. Kozawa M. 0:2 (1:6, 5:7) details 13.06.2012 1/8-finals Kozawa M. Namigata J. 1:2 (4:6, 6:4, 4:6) details 24.05.2012 1/16-finals Kozawa M. Takayama C. 2:0 (6:4, 7:6) details 22.05.2012 Quarter-finals Boev M. Kozawa M. 2:1 (2:6, 6:4, 6:2) details 15.01.2012 Quarter-finals Kermet K. Kozawa M. 2:1 (1:6, 6:4, 6:3) details 08.01.2012
Japan: Karuizawa - Singles - Main
Thailand: Pattaya 2 - Singles - Main
USA: Plantation - Singles - Qualification