Raiden Tameemon (雷電爲右衞門), born Seki Tarōkichi, was a Japanese sumo wrestler from Tōmi, Nagano Prefecture. He is considered one of the greatest rikishi in history, although he was never promoted to yokozuna. To date, he holds the record for best top division win ratio of all time.

Sumo is a form of competitive full-contact wrestling where a rikishi (wrestler) attempts to force his opponent out of a circular ring (dohyō) or into touching the ground with any body part other than the soles of his feet.