This serves both to protect the blade and to give it its signature wavy design called ... of water in a rapid cool-down process called "quenching." Because the sword's back edge and inner core ...

The katana is the logo of Ginza Choshuya, a company that specializes in Japanese swords in Tokyo’s Chuo ... “That’s cool!” Fukami chose not to contact Saso before the U.S. Open.