| LDP : | Liberal Democratic Party | |
| DPJ : | Democratic Party of Japan and Club of Independents | |
| JRP : | Japan Restoration Party | |
| NK: | New Komeito | |
| YP : | Your Party | |
| JCP : | Japanese Communist Party | |
| PLP : | People's Life Party | |
| SDP : | Social Democratic Party | |
| Ind : | Independent |