Hydro Anchor (ハイドロアンカー, Haidoro Ankā) is a punching catch hissatsu technique.
- Fukami Dandou
- Houki Ryuuhei
- Iron Guts
- Kabutenji Yaku
- Posei Donichi
- Sendai Hiroaki
- Umeo Suzuto
Fukami used this hissatsu three times during the match between Raimon and Kaiou Gakuen. He succeeded in stopping Kurama Norihito's Sidewinder but failed to stop Tsurugi Kyousuke's Death Drop and Nishizono Shinsuke's Buttobi Jump.
Afterwards, this hissatsu was seen yet again in episode 32, but only in a flashback where Tenma, Shinsuke, Shindou, Aoi, Akane and Midori were thinking of the past matches, and it was not used in the episode itself.
The user first throws an anchor behind the ball and then starts pulling the anchor with the ball to his hands.