Nakamura-Berta has had a very successful karting career. He took his first European title at the IAME International final at Le Mans in 2019 in the X30 Mini Category.[3] For 2020, he joined the 60 Mini category. He came second in the WSK Euro Series, and second in the WSK Super Master Series.[4][5] In 2021, he joined the OK-Junior category, and in October he won the Karting World Championship in the category. By the end of the season, Nakamura-Berta was competing in the OK category, and he won his first OK title at the South Garda Winter Cup.[6][7] In 2022, Nakamura-Berta won the Karting European Championship, controversially beating his Kart Republic teammate Alex Powell.[8] For 2023, Nakamura-Berta continued in OK Karting whilst making some KZ2 appearances. He came second in the OK category in Champions of the Future, and came sixth in KZ2 in the World and European karting Championships.[9]
Formula 4
2023
At the end of 2023, Nakamura-Berta made an appearance at the final two rounds of the Formula 4 South East Asia Championship with Prema Racing.[10] He claimed two pole positions, three fastest laps and a best finish of second over the course of six races.[11]
2024
During the winter, Nakamura-Berta competed in the Formula 4 UAE Championship.[12] He opened his account by scoring his first single-seater victory during the first race in Yas Marina, before earning a double podium for the second Yas Marina round.[13] Another double podium followed in the first Dubai round, but his title hopes were hampered by a double retirement in the next round.[14] He managed to take another win and a second place in the Dubai second round, which allowed him to finish runner-up in the standings to Freddie Slater.[15]
For his main campaign, Nakamura-Berta would be competing in both Italian F4 and Euro 4 for Prema Racing for the coming season.[16] In the first half of the season, he only took one podium during the opening round in Imola, but was able to take his first win in a damp race in Paul Ricard.[17][18] He earned three more podiums following that and placed sixth in the standings, missing out on the rookie title to Alex Powell by six points.[19] In Euro 4, Nakamura-Berta had a more successful campaign, racking up one win in Monza and ended third in the overall standings, as well as being the rookie champion.[20]