Hate to break this to you, pal, but we did equip the Bundeswehr with nukes back in the day. It was a "dual-key" arrangement, in which a US officer held a virtual "veto" over whether or not the nukes would be used (based on a decision by the National Command Authority). In this case, it's a moot point, since Mr. Abe says that the Japanese don't want any nukes, just missile defense.
That's not the same thing as having an autonomous Japanese nuclear program, which is basically what Krauthammer and some of the posters here want. The Germany veto setup is not too different from a nuclear umbrella, just merely localized.