Asia: Asia Championship U18 - Play Offs |
| Final | South Korea U18 | Japan U18 | 77:73 (44:46, 33:27) | details | 28.08.2022 |
| Semi-finals | Lebanon U18 | Japan U18 | 67:80 (27:37, 40:43) | details | 26.08.2022 |
| Quarter-finals | Chinese Taipei U18 | Japan U18 | 60:76 (29:42, 31:34) | details | 24.08.2022 |
Asia: Asia Championship U18 - Main |
| Group A | Japan U18 | Iran U18 | 66:68 (49:27, 17:41) | details | 23.08.2022 |
| Group A | Lebanon U18 | Japan U18 | 63:84 (21:42, 42:42) | details | 22.08.2022 |
Asia: Asia Championship U18 - 5th-8th places |
| 5th place | Iran U18 | Japan U18 | 58:60 (22:29, 36:31) | details | 11.08.2018 |
| Semi-finals | Bahrain U18 | Japan U18 | 85:92 ET (39:26, 36:49, 10:17) | details | 10.08.2018 |
Asia: Asia Championship U18 - Play Offs |
| Quarter-finals | Australia U18 | Japan U18 | 88:52 (42:27, 46:25) | details | 09.08.2018 |
| 1/8-finals | Japan U18 | Lebanon U18 | 85:67 (40:37, 45:30) | details | 08.08.2018 |
Asia: Asia Championship U18 - Main |
| Group A | Iran U18 | Japan U18 | 71:64 (33:31, 38:33) | details | 07.08.2018 |
| Group A | Indonesia U18 | Japan U18 | 53:86 (22:40, 31:46) | details | 06.08.2018 |
| Group A | Japan U18 | Kazakhstan U18 | 88:40 (36:14, 52:26) | details | 05.08.2018 |
World: Albert Schweitzer Tournament - 9th-12th places |
| 11th place | Japan U18 | Egypt U18 | 61:67 (35:27, 26:40) | details | 06.04.2018 |
World: Albert Schweitzer Tournament - Main |
| Group A | Japan U18 | Israel U18 | 72:78 (33:38, 39:40) | details | 05.04.2018 |
| Group A | Argentina U18 | Japan U18 | 77:78 (37:43, 40:35) | details | 04.04.2018 |
| Group A | Japan U18 | Australia U18 | 56:85 (31:40, 25:45) | details | 02.04.2018 |
| Group A | Germany U18 | Japan U18 | 113:48 (66:21, 47:27) | details | 01.04.2018 |
| Group A | Japan U18 | Turkey U18 | 67:73 (31:35, 36:38) | details | 31.03.2018 |
Asia: Asia Championship U18 - Play Offs |
| Final | Iran U18 | Japan U18 | 71:65 (35:26, 36:39) | details | 31.07.2016 |
| Semi-finals | Japan U18 | Lebanon U18 | 75:59 (36:33, 39:26) | details | 30.07.2016 |
| Quarter-finals | Chinese Taipei U18 | Japan U18 | 71:77 (36:41, 35:36) | details | 29.07.2016 |
Asia: Asia Championship U18 - Main |
| Group B | Japan U18 | Kazakhstan U18 | 98:78 (43:36, 55:42) | details | 27.07.2016 |
| Group B | Japan U18 | Lebanon U18 | 51:73 (18:33, 33:40) | details | 26.07.2016 |
| Group B | Japan U18 | Iran U18 | 81:77 (44:45, 37:32) | details | 24.07.2016 |
| Group B | Indonesia U18 | Japan U18 | 54:113 (28:47, 26:66) | details | 23.07.2016 |
| Group B | Japan U18 | South Korea U18 | 72:92 (29:37, 43:55) | details | 22.07.2016 |
World: Albert Schweitzer Tournament - 9th-12th places |
| 9th place | Japan U18 | USA U18 | 81:88 (50:48, 31:40) | details | 01.04.2016 |
World: Albert Schweitzer Tournament - Main |
| Group A | Japan U18 | Turkey U18 | 70:89 (42:35, 28:54) | details | 31.03.2016 |
| Group A | Argentina U18 | Japan U18 | 71:76 (33:26, 38:50) | details | 30.03.2016 |
| Group A | Japan U18 | Serbia U18 | 62:87 (35:50, 27:37) | details | 28.03.2016 |
| Group A | Japan U18 | Australia U18 | 45:84 (17:43, 28:41) | details | 27.03.2016 |
| Group A | Germany U18 | Japan U18 | 89:59 (40:24, 49:35) | details | 26.03.2016 |
Asia: Asia Championship U18 - 5th-8th places |
| 5th place | Japan U18 | Philippines U18 | 105:113 ET (49:46, 44:47, 12:20) | details | 28.08.2014 |
| Semi-finals | Japan U18 | Malaysia U18 | 87:63 (42:31, 45:32) | details | 27.08.2014 |
Asia: Asia Championship U18 - Play Offs |
| Quarter-finals | South Korea U18 | Japan U18 | 90:61 (36:34, 54:27) | details | 26.08.2014 |
Asia: Asia Championship U18 - Main |
| Group F | Kuwait U18 | Japan U18 | 55:86 (30:42, 25:44) | details | 24.08.2014 |
| Group F | Japan U18 | Iran U18 | 65:72 (32:37, 33:35) | details | 23.08.2014 |
| Group F | Kazakhstan U18 | Japan U18 | 80:81 (37:43, 43:38) | details | 22.08.2014 |
Asia: Asia Championship U18 - Preliminary |
| Group D | Japan U18 | Chinese Taipei U18 | 75:84 (36:38, 39:46) | details | 21.08.2014 |
| Group D | Hong Kong U18 | Japan U18 | 71:96 (30:50, 41:46) | details | 20.08.2014 |
| Group D | Japan U18 | Iraq U18 | 81:62 (41:26, 40:36) | details | 19.08.2014 |
World: Albert Schweitzer Tournament - Placement Play Offs |
| 15th place | Japan U18 | Chile U18 | 59:73 (31:39, 28:34) | details | 25.04.2014 |
World: Albert Schweitzer Tournament - Losers stage |
| Group G | Argentina U18 | Japan U18 | 95:83 (46:29, 49:54) | details | 24.04.2014 |
| Group G | Japan U18 | England U18 | 63:86 (29:44, 34:42) | details | 23.04.2014 |
World: Albert Schweitzer Tournament - Main |
| Group B | Slovenia U18 | Japan U18 | 101:88 (55:53, 46:35) | details | 21.04.2014 |
| Group B | Japan U18 | Turkey U18 | 69:147 (23:83, 46:64) | details | 20.04.2014 |
| Group B | Germany U18 | Japan U18 | 115:73 (63:32, 52:41) | details | 19.04.2014 |
Asia: Asia Championship U18 - Play Offs |
| 3rd place | Japan U18 | Iran U18 | 83:87 (46:49, 37:38) | details | 26.08.2012 |
| Semi-finals | Japan U18 | China U18 | 80:103 (38:54, 42:49) | details | 25.08.2012 |
| Quarter-finals | Chinese Taipei U18 | Japan U18 | 67:68 (40:41, 27:27) | details | 24.08.2012 |