File:Tōhoku Proportional Block.svgDescriptionTōhoku Proportional Block.svg English: Tōhoku proportional representation block constituency of the Japanese House of Representatives Date
File:Chūgoku Proportional Block.svgDescriptionChūgoku Proportional Block.svg English: Chūgoku proportional representation block constituency of the Japanese House of Representatives Date
File:Tōkyō Proportional Block.svgDescriptionTōkyō Proportional Block.svg English: Tōkyō proportional representation block constituency of the Japanese House of Representatives Date 30
File:Shikoku Proportional Block.svgDescriptionShikoku Proportional Block.svg English: Shikoku proportional representation block constituency of the Japanese House of Representatives Date
File:Tōkai Proportional Block.svgDescriptionTōkai Proportional Block.svg English: Tōkai proportional representation block constituency of the Japanese House of Representatives Date 30