Top 10 men with the most combined number of days holding the IWGP Heavyweight (and IWGP World) Championship.

Just for fun. And I am combining the IWGP Heavy and World Belts cause I see no true distinction.

1. Kazuchika Okada – 2,043 days combined with 7 reigns total (1,790 days and 5 reigns with IWGP Heavy and 253 days and 2 reigns with IWGP World).
2. Hiroshi Tanahashi – 1,396 days combined with 8 reigns total.
3. Keiji Mutoh/Great Muta – 1,238 days combined with 4 reigns total.
4. Shinya Hashimoto – 1,052 days combined with 3 reigns total.
5. Tatsumi Fujinami – 785 days combined with 6 reigns total.
6. Kensuke Sasaki/Power Warrior – 647 days combined with 5 reigns total.
7. Tetsuya Naito – 592 days combined with 5 reigns total (387 days and 3 reigns with IWGP Heavy and 205 days and 2 reigns with IWGP World).
8. Yuji Nagata – 570 days combined with 2 reigns total.
9. Kazuyuki Fujita – 478 days combined with 3 reigns total.
10. Big Van Vader – 451 days combined with 3 reigns total.