Hideki Matsui (松井 秀喜, Matsui Hideki?, born June 12, 1974, in Neagari, Ishikawa, Japan) is a designated hitter for the New York Yankees. He bats left-handed and throws right-handed.

Hideki Matsui was born in Neagari, Ishikawa, Japan (later merged into Nomi, Ishikawa). He started playing baseball when he was in elementary school. According to an interview on YES Network's "CenterStage", Matsui originally batted right-handed as a child. However, when he started playing with his older brother and his friends, Matsui was such a good batter that his embarrassed brother insisted that he bat left-handed or stop playing with them. Matsui soon enough became an overpowering left-handed batter, and stayed on that side of the plate from then on.

Matsui participated in four National High School Baseball Tournaments at Koshien Stadium, once in the spring and three times in summer, during his high school years. In 1992, he drew five consecutive intentional walks in a game at Koshien and became a nationwide topic in Japan at that time (partly because intentionally walking batters was very uncommon in Japanese amateur baseball at that time), even though the strategy worked and his team lost. Matsui graduated from Seiryo High School in Kanazawa, Ishikawa.