Hmm, I can understand the "Japanese" interest.
Most vape gear, especially tube mechs are made of steel and one does tend to equate ( at least I do ) well made steel with Japan.
They have of course made swords and knives into an art and many of the old rolled steel swords cant be equaled in quality, sharpness and longevity.
I know that Pinoy/ Phillipino mods are absolutely some of the best around, but I really have not seen many actually made in Japan vape gear. Ive seen a lot with Japanese names, but most or made in China and not really the quality one equates with Samurai Swords.