Kenkichi Yabashi (矢橋 賢吉, Yabashi Kenkichi, October 24, 1869 - May 24, 1927) was a Japanese architect and high-level official of Ministry of Finance, known as the person from the Yabashi family that has the known pedigree record dating back to the Saga Genji (嵯峨源氏) and Minamoto no Tōru (源融) who is sometimes mentioned as the model for Hikaru Genji (光源氏) in important Japanese literary classic The Tale of Genji (源氏物語), a branch line of Emperor Saga. He is known as the central figure who organised the construction of National Diet Building.