| 11. | He was elected to the House of Councillors of the Diet of Japan.
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| 12. | Tanaka's nomination meant he automatically forfeited his House of Councillors seat.
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| 13. | He was also the secretary-general of the House of Councillors of the party.
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| 14. | As the House of Councillors can veto a decision made by the Emperor.
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| 15. | He served as member of the House of Councillors from 1977 to 1989.
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| 16. | He was elected to the House of Councillors in July 2010.
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| 17. | Hata's son, Yuichiro, is a member of the House of Councillors of Japan.
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| 18. | He serves as member of the House of Councillors as a national proportional representative.
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| 19. | He was elected to the House of Councillors for the first time in 1998.
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| 20. | He stood for election to the House of Councillors in 2001, but was unsuccessful.
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