- Name: Seiyaku no Yon (Lit. Fourth Restriction)
- Type: Seal
- User: Seireitou Hyuga (Only)
This was the fourth seal out of 5 seals that were placed on Seireitou after unlocking his full potential due to the enormus power contained within him. This is the fourth seal seireitou will break to unseal some of his sealed power, used after the Seiyaku no San. However, Byakko told seireitou to never go beyond his 2nd seal, for fear of his destructive power beyond the second seal.