[1] He also graduated as a Rabbi from the Hildesheimer Rabbinical Seminary of Berlin, and was head of the Haredi Students Organization in the city, as well as being a member of the Young Aguda movement.

[1] His position as head of the largest Ultra-orthodox workers union meant that he became a member of Provisional State Council, and was one of the people to sign Israel's declaration of independence.

Kahana headed the faction in the Knesset, and was appointed Deputy Minister of Education and Culture when the party joined David Ben-Gurion's coalition government.

Despite not being a coalition partner in the fourth, fifth and sixth governments, Kahana retained his Deputy Ministerial position.

Poalei Agudat Yisrael ran independently in the 1961, 1965 and 1969 elections, with Kahana retaining his seat as head of the party each time.