Below is one of the Imperial Japanese Pilots wearing the Longines Weems.
It says here in this book that the Longines Weems for the Imperial Japanese Navy was ordered by the Tateyama Air Base.
Here is a great picture of a Mitsubishi G4M Bomber Observer wearing the Longines Weems.
Here is a picture of the Longines Weems at the Tateyama Air Base Historical Museum