Matsushita made his Olympic debut at the 2024 Paris Games. Competing in the Men's 400m Individual Medley, he secured a silver medal. The event took place on 28 July 2024 at the Paris La Defense Arena. His performance was commendable, clocking a time of 4:08.62.

Before his Olympic debut, Matsushita had already shown his potential on the international stage. He won gold in the 400m Individual Medley at the 2023 World Junior Championships and silver in the 200m Individual Medley in 2022. Additionally, he earned four medals at the 2022 Pan Pacific Junior Championships.
In early 2024, Matsushita spent a month training at high altitude in Sierra Nevada, Spain. This was his first high-altitude camp overseas, aimed at enhancing his performance for the Olympics. His dedication to training paid off with his strong showing in Paris.
Looking ahead, Matsushita aims to win a medal at the Los Angeles 2028 Olympic Games. His journey so far indicates that he is well on his way to achieving this goal. With continued hard work and determination, he hopes to make Japan proud once again.
Matsushita draws inspiration from Kosuke Hagino, a four-time Olympic medallist from Japan. Hagino's achievements have motivated Matsushita to strive for excellence in his swimming career. The support from his club and coach has also been instrumental in his success.
As of now, Matsushita ranks second in the Men's 400m Individual Medley based on time. His performance places him among the top swimmers globally, showcasing his potential to achieve even greater heights in future competitions.
Matsushita's journey is a testament to his hard work and dedication. As he continues to train and compete, he remains focused on his goal of winning an Olympic medal in Los Angeles. His achievements so far are just the beginning of what promises to be an illustrious career in swimming.Matsushita made his Olympic debut at the 2024 Paris Games. Competing in the Men's 400m Individual Medley, he secured a silver medal. The event took place on 28 July 2024 at the Paris La Defense Arena. His performance was commendable, clocking a time of 4:08.62.