Observed phase changes and the random sequential packing model for elections in Japan

In Japan the nomination of candidates by some political parties in each constituency seems to have been often performed like car-parking in a street, which explains the territory making behaviour for each candidate. The car-parking model is a one-dimensional sequential packing model. We apply this model to the election data for the House of Councillors and the House of Representatives. We observe phase changes for the election data of the House of Councillors.