Figures from 1998 to 2022 are the number of members recorded at the convocation of the diet after the House of Councillors election. Figures from 2025 are the number recorded as of January 8, 2025.
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Number of members in the House of Councillors Japan 1998-2025, by gender
As of January 2025, there were *** members of the Japanese House of Councillors, of which around **** percent were female. The House of Councillors is the upper house of the Japanese parliament. Once elected, members have six years of terms of service. Half of the members of the house are replaced in a regular election conducted once in three years.
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Cabinet Office Japan. (April 30, 2025). Number of National Diet members in the House of Councillors in Japan from 1998 to 2025, by gender [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved August 05, 2026, from /statistics/1261980/japan-number-members-house-of-councillors-by-gender/
Cabinet Office Japan. "Number of National Diet members in the House of Councillors in Japan from 1998 to 2025, by gender." Chart. April 30, 2025. ÌÇÐÄÆƽâ°æ. Accessed August 05, 2026. /statistics/1261980/japan-number-members-house-of-councillors-by-gender/
Cabinet Office Japan. (2025). Number of National Diet members in the House of Councillors in Japan from 1998 to 2025, by gender. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: August 05, 2026. /statistics/1261980/japan-number-members-house-of-councillors-by-gender/
Cabinet Office Japan. "Number of National Diet Members in The House of Councillors in Japan from 1998 to 2025, by Gender." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 30 Apr 2025, /statistics/1261980/japan-number-members-house-of-councillors-by-gender/
Cabinet Office Japan, Number of National Diet members in the House of Councillors in Japan from 1998 to 2025, by gender ÌÇÐÄÆƽâ°æ, /statistics/1261980/japan-number-members-house-of-councillors-by-gender/ (last visited August 05, 2026)
Number of National Diet members in the House of Councillors in Japan from 1998 to 2025, by gender [Graph], Cabinet Office Japan, April 30, 2025. [Online]. Available: /statistics/1261980/japan-number-members-house-of-councillors-by-gender/
