Japan
| Year | Electoral system family | Electoral system for national legislature | Number of tiers | Legislative size (directly elected) | Legislative size (voting members) | Electoral system for the president |
|---|---|---|---|---|---|---|
| 2021 | Mixed | Parallel | 2 | 465 | 465 | Not applicable |
| 2017 | Mixed | Parallel | 2 | 465 | 465 | Not applicable |
| 2014 | Mixed | Parallel | 2 | 475 | 475 | Not applicable |
| 2012 | Mixed | Parallel | 2 | 480 | 480 | Not applicable |
| 2009 | Mixed | Parallel | 2 | 480 | 480 | Not applicable |
| 2005 | Mixed | Parallel | 2 | 480 | 480 | Not applicable |
| 2003 | Mixed | Parallel | 2 | 480 | 480 | Not applicable |
| 2000 | Mixed | Parallel | 2 | 480 | 480 | Not applicable |
| 1996 | Mixed | Parallel | 2 | 500 | 500 | Not applicable |
| 1993 | Other | SNTV | 1 | 511 | 511 | Not applicable |
