Former Japanese prime minister Shinzo Abe, the most influential Japanese politician of the past two decades, has died after he was shot by a gunman during an election campaign event. The alleged shooter served in the country’s navy for three years until his discharge in 2005, according to Japanese television station NHK, citing Defence Ministry sources. After being detained, the alleged perpetrator said he was “dissatisfied” and had hoped to kill Abe, NHK reported. The shooter did not hold a grudge against Abe’s political beliefs, the Naha prefectural police cited him as saying. Abe was Japan’…