The United States and Japan have estimated the total cost of jointly developing a new type of missile capable of intercepting hypersonic weapons will exceed $3 billion, a Defense Department official said Thursday. Of the total, Japan will allocate $1 billion to the Glide Phase Interceptor project, according to the official from the U.S. Missile Defense Agency. The two countries are aiming to complete the missile’s development by the 2030s. The joint development was agreed on by President Joe Biden and Japanese Prime Minister Fumio Kishida in August last year ahead of a trilateral summit with t…