After serving for the Ministry of Construction, Kuniomi Iwai ran for the 1995 election of the House of Councillors with official support from the Liberal Democratic Party (LDP). He worked for the Mori and Koizumi administrations as a construction-expert Diet member and retired in 2007; in 2001, the Ministry of Land, Infrastructure, Transport and Tourism was founded, merging the Ministry of Construction and some other ministries.
Iwai's website states his philosophy and his opinion regarding the emperor. He states that the current constitution was forced on Japan by the United States, and that it should be revised to reflect Japanese tradition and culture. He also states that the core of a new constitution must be based on Japanese wisdom and traditions. He believes that one important idea in Japanese culture, that of accepting difference, will be essential in building a new world civilization.