Jeez - sorry, can't read in my dotage. You wrote Isu, not Ipe. Isu is a lovely wood, but not for impact. It's used in Japan as "kazari-mono" - (something to display).
Man that's really disappointing. I was just off buying the Isu one, I had my heart set on it, but I guess it's just plain old white oak...the same as everyone else either white oak or Hickory. Thanks though.