骨董品店で買った錆包丁を18時間手作業で研いだ結果

包丁が切れない原因は？研いでも切れ味が戻らない時に試したい解決方法【関孫六】

プロがやっている包丁の研ぎ方【めちゃくちゃ切れます】How to sharpen the kitchen knife

sharpest scissor made of "$1 kitchen knife" in the world

The process of making a Japanese tuna knife. A blacksmith who has been making knives for 65 years.

刀剣にこめられた日本人の心

【完全解説】基本 出刃包丁の研ぎ方

World’s Largest Lighter Restoration ASMR

Kitchen knife made by cooking sand in a microwave oven

Gun Restoration, Colt M1911 U.S. ARMY 1914, (with test fire).

畑で拾ったお金を磨いてみた

筋引き包丁の研ぎ方

刀匠の挑戦　The way of Japanese sword smith

How Japanese swords are made. The top-secret story of a sword smith.

sharpest smoke kitchen knife in the world

Cleaver Restoration [Black Cleaver With Ebony Handle]

【包丁の研ぎ方】初心者でも分かる砥石を使った洋包丁の研ぎ方、プロ直伝の技でめちゃくちゃ切れる！

Forging a WAKIZASHI out of Rusted Iron CHAIN

sharpest candy kitchen knife in the world

How Japanese samurai swords were made. A 75-year-old swordsman who has made 1,000 Japanese swords

sharpest shark teeth kitchen knife in the world