Question:
Which political party did Takeo Miki belong to in Jul, 1946?

Context:
 Takeo Miki is a member of the Liberal Democratic Party from Jan, 1955 to Jan, 1988. 
 Takeo Miki is a member of the Kaishintō from Jan, 1952 to Jan, 1954. 
 Takeo Miki is a member of the National Cooperative Party from Jan, 1947 to Jan, 1950. 
 Takeo Miki is a member of the Japan Democratic Party from Jan, 1954 to Jan, 1955. 
 Takeo Miki is a member of the Cooperative Democratic Party from Jan, 1946 to Jan, 1947. 
 Takeo Miki is a member of the National Democratic Party (Japan) from Jan, 1950 to Jan, 1952.

Answer:
Cooperative Democratic Party