However, Tamanoumi's sudden death in October 1971 shook Kitanofuji badly and affected his performance in the ring. Now the sole "yokozuna" in sumo, he went into a slump. After poor performances in the first two tournaments of 1972, he pulled out of the May 1972 tourney because of insomnia. He took a leave of absence from the next tournament in July, but went on a trip to Hawaii and was caught surfboarding. He was cautioned by the Japan Sumo Association and immediately apologised. He returned to win the next championship with a perfect record in September 1972. His final title came in March 1973, and his last challenge for a championship was in July of that year when he lost a playoff to veteran Kotozakura.