Isao Machii

Isao Machii (町井勲) is a Japanese Iaido master (Shūshinryū Iaijutsu hyōhō, Shūshin-kan head master) in Kawanishi, Hyōgo, Japan.

He holds a number of Guinness World Records for his katana skills, including "Most martial arts katana cuts to one mat (suegiri)", "Fastest 1,000 martial arts sword cuts", "Most sword cuts to straw mats in three minutes", and "Fastest tennis ball (708km/h) cut by sword".