As of September 2025, was the longest-serving Japanese prime minister since 1989, spending a total of days in the office. *** was also the longest-serving prime minister in Japanese history.
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Prime Minister's Office of Japan. (September 17, 2025). Longest term lengths of prime ministers inaugurated since the Heisei era in Japan as of September 2025 (days in office) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 31, 2026, from /statistics/1262231/japan-prime-ministers-longest-tenure-since-heisei/
Prime Minister's Office of Japan. "Longest term lengths of prime ministers inaugurated since the Heisei era in Japan as of September 2025 (days in office)." Chart. September 17, 2025. ÌÇÐÄÆƽâ°æ. Accessed July 31, 2026. /statistics/1262231/japan-prime-ministers-longest-tenure-since-heisei/
Prime Minister's Office of Japan. (2025). Longest term lengths of prime ministers inaugurated since the Heisei era in Japan as of September 2025 (days in office). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 31, 2026. /statistics/1262231/japan-prime-ministers-longest-tenure-since-heisei/
Prime Minister's Office of Japan. "Longest Term Lengths of Prime Ministers Inaugurated since The Heisei Era in Japan as of September 2025 (Days in Office)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 17 Sep 2025, /statistics/1262231/japan-prime-ministers-longest-tenure-since-heisei/
Prime Minister's Office of Japan, Longest term lengths of prime ministers inaugurated since the Heisei era in Japan as of September 2025 (days in office) ÌÇÐÄÆƽâ°æ, /statistics/1262231/japan-prime-ministers-longest-tenure-since-heisei/ (last visited July 31, 2026)
Longest term lengths of prime ministers inaugurated since the Heisei era in Japan as of September 2025 (days in office) [Graph], Prime Minister's Office of Japan, September 17, 2025. [Online]. Available: /statistics/1262231/japan-prime-ministers-longest-tenure-since-heisei/
