Kōtarō Tanaka

• Kōtarō Tanaka (judge), Japanese jurist, judge of the International Court of Justice, and politician
• Kōtarō Tanaka (photographer), Japanese photographer
• Kōtarō Tanaka (actor), Japanese business executive and former actor
• Koutaro Tanaka, or Kōtarō Tanaka, actor
• Kōtarō Tanaka, musician on "Stay the Ride Alive"