Forbidden Individual Curse Tag

This is a cursed seal that is placed directly on the target's heart.

Usage
The cursed seal is designed to restrict such as preventing them from taking their own lives and removing the cursed seal themselves. Directly striking the heart appears able to remove the seal, albeit risking one's life in the process. According to Obito Uchiha, the cursed seal also interfered with him becoming the Ten-Tails' jinchūriki.

Trivia

 * Both Rin Nohara and Obito Uchiha, who were branded with this cursed seal, had it removed by Kakashi Hatake's Lightning Cutter separately, although Rin died while Obito survived, albeit barely because of the tremendous life force in Hashirama's cells. Had he not sealed the Ten-Tails into his body shortly after, it's doubtful he would have survived the injury.