事实是1964年中国核爆后，日本新选的首相佐藤荣非常害怕，认为中国是'madman with a knife', 但要求美国使用核武器保护日本近乎政治自杀。当时的对话是日本首相表示对“Japan’s lack of nuclear weapons and the problem of Japan’s security.”的担忧。LBJ回应
“if Japan needs our nuclear deterrent for its defense, the United States would stand by its commitments and provide that defense.” 日本首相表示这是他想要的但无法公开表达的想法。
wiki并非原始文献，我没在网上看到原始文献，是这两个：
1. Memorandum for the Record, ”White House Meeting with Prime Minister Sato, 11:30a.m. January 12, 1965,” January 13, 1965, National Security File, Country File Japan, Box 253, LBJ Library.
2. Memorandum of Conversation between Johnson and Sato, “Current U.S.-Japanese and World Problem”, January 12, 1965, National Security File, Country File Japan, Box 253, LBJ Library.