🔥Core Technology Uses aircraft-grade aluminum 7075 | Shinkansen body cutting technology Black matte coating created by swordsmiths | 98% less fingerprint residue (verified by a third party)
🛡Trust Certificate Hiroshima University impact experiment video released | Koshu traditional polishing technique certificate included "Three-way shock absorbing structure" developed in cooperation with the Self-Defense Forces
💼Real-life examples "Quickly set up a stand during a business meeting → Client praised it as 'samurai smartness'" - 41-year-old sales manager "The person sitting next to me on the commuter train bought me one too → 3rd one" - 29 years old, finance worker
