Open to anyone, regardless of gender or DDT employment status, the championship is defended "24/7", as in any time, anywhere, as long as a referee is there to confirm the win.

On June 29, 2000, Poison Julie Sawada introduced the Ironman Heavymetalweight Championship in DDT as a parody of the WWF Hardcore title and recognized himself as the first champion.

[5] The championship belt design features three glittery silver plates on a black leather strap which has a snake skin pattern on the back.

Danshoku Dino holds the record for longest combined reign with at least 534 days and counting (the exact date of when he won his tenth title is uncertain).

Non-wrestlers to have held the title include AV idol Nao Saejima, TV personality LiLiCo, J-pop idols Akari Suda, Kaori Matsumura, Rise Shiokawa, Aika Sawaguchi, Misaki Natsumi, Momomi Wagatsuma and Lingling, Tokyo Metropolitan Assemblyman Shinichiro Kawamatsu, a cat named Bunny, a monkey, a three-time champion ladder, Vince McMahon's Hollywood Walk of Fame star, a copy of The Young Bucks' autobiography Killing the Business, and the title belt itself.

As of November 2024, there have been over 1,700 title changes for the belt, which has been won by numerous male and female wrestlers and non-wrestlers, including children, animals, entire audiences and inanimate objects.