Out of the 480 lower house seats, 300 are elected from single-seat districts and the remaining 180 by proportional representation in 11 regional blocks. Under the electoral system, each voter casts two ballots--one to choose a single-seat candidate and the other to choose a political party or group from the proportional representation block.

So - if I am reading this right - 300 first-past-the-post seats and 180 in a seperate proportional election (as opposed to the combined system they use in Germany).

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