Toyosu - Toshimaku Sugamo Coated Optics - was an optics maker for civillian use, that was enlisted to produce goods for the war effort during WWII.
Teiichi Taniguchi was the last in a line of Taniguchi's to head this company before it sold in the 60's. I am happy to be able to call Taniguchi Teiichi "ojiisan" or grandfather, and on my last visit with him he gifted me these Field Glasses. They are one thing I count as priceless to me - no amount of money or threat would inspire me to part with them - and it is in no small part the joy of looking at them as it is looking through them that sees them constantly in my hands.
Toyosu Coated Optics