I found a set on ebay. Japanese.
Japanese Officer's 6 x 25mm/9.3° WW2 Military Binoculars. These great little glasses are a strong contender for best infantry binoculars of any nation in WW2, especially compared to the many 6 x 30 WW1 types still in use 1939-45 and beyond by most other major powers. This “clean sheet of paper” design drew upon Japan's vast optical expertise, the brief simple:- provide the best possible optical performance in the smallest, lightest package possible in keeping with the Japanese army's policy of rapid advance carrying the bare minimum of kit. These really are small glasses, overall length 90mm/3.5”, width 150mm/6". and weight just 435gms/15ozs. Specification is still impressive, true wide-angle capability using big "Erfle" 5-element eyepieces giving the “9.3” degree view by which the glasses are often known. Combine this panoramic view with flat, pin-sharp optics and you have the ideal tool for spotting any potential hostile movement on the battlefield.