When the started in 1941 Nippon Sewing Machine Manufacturing Company aka Brother Sales Ltd had to switch from manufacturing commercial sewing machines to industrial sewing machines. Not much information was available if Brother produced any additional products for the war effort. However, it was noted that many of their factories received extensive war damage.
Epson started in 1941 as Daiwa Kogyo LTD and was located in Suwa, Nagano, Japan. Not much information was available for Daiwa Kogyo during the war effort, however Daiwa Kogyo was part of the Sieko conglomerate. Sieko like many other Japanese companies were ordered to produce military items such as timing fuses and ammunition.
Now, here's something I never knew in doing some research on timing fuses.
"From late 1944 until early 1945, the Japanese launched over 9,000 of these fire balloons, of which 300 were found or observed in the U.S. Some guesswork gives the total number that made the trip at about 1,000. Despite the high hopes of their designers, the balloons were relatively ineffective as weapons, causing only six deaths and a small amount of damage, and they survive in memory mostly as an ingenious and dangerous curiosity."
Geez, I wonder if this can still happen today, could these balloons go undetected?? Want to read more about the Fire Balloon!