After graduation of Ishida high school, Kido entered at faculty of Physical Education at Kokushikan University. At that time, he joined its kickboxing team. In 2001, he won the title of University Kickboxing Federation at welterweight. In 2002, he won the title of UKF again at middleweight. In 2003, he participated All Japan Shin-Karatedo Championship at middleweight. He won the 3rd place. When he graduated university, he got license to be a teacher for junior high school and high school.
Professional career
On September 14, 2003, he debuted as a professional kickboxer for Martial Arts Japan Kickboxing Federation. On February 25, 2012, Kido knocked out Baek Man-Sun in round 2 at Big Bang 8 in Tokyo. On March 17, 2012 he knocked out Kenta for the Krush 70 kg Title at 1:28 in the second round via spinning back fist. He faced Ludovic Millet at Krush.23 on October 8, 2012 in a non-title fight, beating the Frenchman via unanimous decision. He was knocked out with a head kick by Murthel Groenhart in the quarter-final of the K-1 World MAX 2012 World Championship Tournament Final in Athens, Greece on December 15, 2012. He made the first defence of his Krush title by knocking out Takuro Moriya in round two at Krush.26 on January 28, 2013. Kido defeated Asami Zaurus by way of unanimous decision at Big Bang 12 in Tokyo on February 24, 2013. He knocked down Minnai Massoud twice en route to winning a unanimous decision in the co-main event of Big Bang 13 on June 2, 2013. Kido defended his Krush -70 belt for the second time on August 11, 2013 at Krush.30 when he beat Yutaru Yamauchi by unanimous decision. He lost to Andy Souwer by unanimous decision at the K-1 World MAX 2013 World Championship Tournament Final 16 in Majorca, Spain on September 14, 2013. He beat Kuntap Weerasakreck by split decision at Big Bang 15 in Tokyo, Japan on December 1, 2013. Kido is set to fight Minoru "Philip" Kimura in a Super Fight at the K-1 World GP in Saitama, Japan on November 23, 2017.
Titles
Amateur
*2001 University Kickboxing Federation Welterweight champion
*2002 University Kickboxing Federation Welterweight champion
*The 14th All Japan Shin Karate Championship K-2 Tournament Middleweight 3rd place