[ Japan could have said more, but isn't he already potentially altering history? If Germany fights hard enough to win, how would the world change to reflect that? With such worries in mind, he keeps his response simple. ]

Please do not do anything too drastic. You know America can be, ah...enthusiastic, and I wouldn't want the same happening to you.

[ He's watching Germany closely now, trying to gauge the other nation's mood. Germany can be as stubborn as America is eager, so he does worry a bit about how this news will affect him. ]