Gohan Located! Intensive Training in the World of the Kais! (見つけた、悟飯！界王神界で猛特訓！ Mitsuketa, Gohan! Kaiōshin-kai de Mōtokkun) is the one hundred thirty-seventh episode of Dragon Ball Z Kai. Its Japanese air date is November 16, 2014. Its American air date is October 21, 2017.
Goku arrives in the Sacred World of the Kai, where Gohan is training with the Z-Sword. Goku decides to help Gohan with his training. Meanwhile, Majin Buu has already killed two thirds of Earth's population. He comes across a blind young boy and heals his vision. Majin Buu becomes surprised when he thanks him instead of being afraid. With Gohan growing more proficient with the Z-Sword, Goku tests out the sword's sharpness by throwing a metal cube at it. Gohan inadvertently breaks the sword in half instead. From the broken sword emerges the Supreme Kai of fifteen generations ago, Old Kai.