Denzo Ishizaki
was a Japanese educator, serving as principle of a lower secondary school in his hometown Ibaraki, and supercentenarian verified as the oldest Japanese man ever (although Shigechiyo Izumi was still believed to have been 120 years and 237 days old at the time) until either late September 2001 when Yukichi Chuganji broke his record by less than two years, or late October 2011 when his record was broken by Jiroemon Kimura, depending on whether his birth year was 1886 or 1884.