Teruaki Shimakura, initiated into sailing at the age of 6, quickly demonstrated prowess. At 13, he secured victory at OP All Japan. Progressing to 16, he clinched the U17 All Japan championship in both 420 and ILCA6 classes. Notably, at 17, he attained 9th place at the ILCA6 Youth World Championship. Shimakura continued to impress, participating in the SailGP Inspire Racing Grand Final at 18 and triumphing as the U25 Youth Match Race All Japan Winner. At 19, he added another title as the 49er All Japan Championship Winner.