He remained in Seattle until at least September 18, 1909, when he participated in a judo demonstration for the Alaska-Yukon-Pacific Exposition. During the 1910s, Kono also started judo clubs in Spokane and Chicago. Later, Itaro Kono joined the Royal Mikado Troupe, a traveling performance act with the Barnum & Bailey Circus that demonstrated Japanese martial arts to American audiences across the country.
He remained in Seattle until at least September 18, 1909, when he performed a judo demonstration for the Alaska-Yukon-Pacific Exposition. During the 1910s, Kono established judo clubs in Spokane and Chicago. Eventually, Itaro Kono joined the Royal Mikado Troupe, which was part of the Barnum & Bailey Circus and demonstrated Japanese martial arts to American audiences across the nation.