Kim Dae-jung was involved in a car accident shortly after the 1971 presidential election which left him with a permanent hip joint injury. Kim believed the accident was a failed assassination attempt from Park, fleeing to Japan for his safety and forming the dissident South Korean democracy movement there. Kim entered permanent self-imposed exile in Japan after the enactment of the Yushin Constitution in 1972. On 8 August 1973, Kim was kidnapped at a meeting of the Democratic Unification Party at the Hotel Grand Palace in Tokyo. According to Kim, his kidnappers probably intended to drown him in the Korea Strait by throwing him overboard en route to Korea. However, they were forced to abandon this plan as the Japan Maritime Self-Defense Force began pursuit and fired an illuminating shell at the boat just when the kidnappers brought Kim on the deck. Kim was subsequently released in Busan, and was found alive five days after the kidnapping at his house in Seoul.