Sword "made in Japan" in Ethiopia

[David]

Not really my area, but the Japan Sword Company, Ltd. is still in business. it was started around 1900 apparently. They have both a website and a Facebook page. It is certainly the same business since the logo seen on Martin's blade is the same exact one that shows at the top of their website. They are located near Tokyo and sell both antiques as well as replicas of swords and armour and do restoration and polish.
My question, which i can't seem to find yet through internet search, is was it always called that or is this a post WWII name. I know that one way of dating objects made in Japan is that before the occupation after WWII many object made for sale in the world market said "Nippon", not "Japan".