Wakagoi Cup (officially known as Hiroshima aluminum cup Wakagoi Tournament) is a Go competition in Japan. It was open for the members of the Nihon Ki-in. The players must be 6-dan or lower and 30 years of age or younger. The winner's prize was ¥2,000,000. It was founded in 2006. The sponsor is Hiroshima Aluminum Industry Co., Ltd.[1] Since 2015, the winner's prize is ¥3,000,000.[2]
| Year | Winner | Runner-Up | ||
| 1. | 2006 | Hsieh Yimin | Lee Ishu | |
| 2. | 2007 | Shida Tatsuya | Mitani Tetsuya | |
| 3. | 2008 | Mitani Tetsuya | Anzai Nobuaki | |
| 4. | 2009 | Uchida Shuhei | Yamamori Tadanao | |
| 5. | 2010 | Terayama Rei | Yamamoto Kentaro | |
| 6. | 2011 | Uchida Shuhei | Shida Tatsuya | |
| 7. | 2012 | Shinji Suzuki | Ichiriki Ryo | |
| 8. | 2013 | Ichiriki Ryo | Fujita Akihiko | |
| 9. | 2014 | Motoki Katsuya | Mutsuura Yuta | |
| 10. | 2015 | Terayama Rei | Shida Tatsuya | |
| 11. | 2016 | Ichiriki Ryo | Motoki Katsuya | |
| 12. | 2017 | Li Yi-hsiu | Yao Zhiteng | |
| 13. | 2018 | Fujita Akihiko | Koike Yoshihiro | |
| 14. | 2019 | Hirata Tomoya | Mutsuura Yuta | |
| 15. | 2020 | Fujisawa Rina | Sun Zhe | |
| 16. | 2021 | Ueno Asami | Nishi Takenobu | |
| 17. | 2022 | Ueno Asami | Koike Yoshihiro | |
| 18. | 2023 | Hirose Yuichi | Koike Yoshihiro |