Kantarō or Kantaro is a given name. Notable people with the name include:

• Kantarō Suga (1934–1994), leading Japanese actor
• Kantarō Suzuki (1868–1948), admiral in the Imperial Japanese Navy, 42nd Prime Minister of Japan
• Kantaro Hoshino (1943–2010), Japanese born, Korean professional wrestler, manager, and promoter
• Kantaro Tomiyama, the president and CEO of Tomy Company, Ltd
• Nakamura Kantarō II (born 1981), Japanese kabuki, television, and film actor

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