Isao Machii (町井勲, Machii Isao, born August 20, 1973) is a Japanese Iaido master (Shūshinryū Iaijutsu hyōhō, Shūshin-kan head master) in Kawanishi, Hyōgo, Japan.^[1]

Isao Machii
Isao Machii, October 2011
Born	(1973-08-20) August 20, 1973 (age 50) Japan
Residence	Hyōgo Prefecture
Style	Iaido, Iaijutsu

He holds a number of Guinness World Records for his katana skills, including "Most martial arts katana cuts to one mat (suegiri)",^[2] "Fastest 1,000 martial arts sword cuts",^[3] "Most sword cuts to straw mats in three minutes",^[4] and "Fastest tennis ball (708km/h) cut by sword".^[5]