Wataru Kubo (久保 亘, Kubo Wataru, 15 January 1929 – 24 June 2003) was a Japanese politician from the Japan Socialist Party (JSP) and then from Democratic Party of Japan.

[3] Then he involved in politics, and in 1963, he was elected to the Kagoshima Prefectural Assembly where he served for three terms.

[13][14] After his resignation, Kubo joined the Democratic Party of Japan (DPJ).

[4] He retired from politics as a member of the DPJ in June 2001 after serving four terms at the upper house, being a representative of Kagoshima Prefecture.

[6] He received the Grand Cordon of the Order of the Rising Sun, Japan's top award for contributions to the state and society, in November 2001.