Aogaku University's esteemed athlete, Kuroda, has drawn substantial attention due to an intriguing "★7" mark found on his right thigh. This unusual symbol, often associated with good luck in Japanese culture, has been a significant topic among sports enthusiasts and spectators. While the origin and exact meaning of the mark remain a mystery, many speculate it signifies the athlete's personal belief in the power of fortune and luck.

Symbols and numbers bear great importance in Japanese culture and often have significant meanings attached to them, which can even influence daily life and decisions. With Kuroda sporting the "★7" symbol on his thigh – a number considered lucky – it stirs intrigue, discussion, and provides an added dimension to sports events. Amidst a strong culture of superstition and symbolism, the seemingly trivial act has deep-rooted cultural importance.

In the US or EU, athletes might have personalized symbols or numbers, but they might not hold the same cultural significance as they do in Japan. However, these symbols can provide a personal touch and evoke spectators' curiosity, enriching the overall sports narrative.