Unless you've got insider information at Leupold, you'll probably never know. I've never seen it nailed down, unlike pretty much every other brand out there, which leads me to believe that there are NDA's on the table at Leupy.
FWIW, the Nikons, at least through the Monarch series, are no longer made in Japan. The two Monarch scopes that I bought earlier this year were made in the PI and my Monarch 5 binos were made in China. The Monarch X and African series are still made in Japan.