The recent ending of Jujutsu Kaisen left several loose ends and questions that intrigue fans. Among them, one of the most important is the whereabouts of Ryomen Sukuna .
The feared antagonist was the driving force behind much of the series' events, and the search for his fingers played a key role in the initial arcs.
The Beginning of Yuji and Sukuna's Journey:

Yuji Itadori 's story begins with him swallowing one of Sukuna's fingers at his school, an event that sets off a series of supernatural events. It would be poetic if Sukuna's last finger were found in the same place where it all began. Furthermore, the finger, while no longer posing an immediate danger, still emanates enough cursed energy to justify hiding it in a strategic location, such as Yuji's school. This could transform the environment into a sanctuary that prevents the presence of cursed spirits.
Jujutsu High protects the last finger:

Another possibility is that the finger is under the protection of Jujutsu High in Tokyo. As one of the most secure institutions in the world, it would be logical for the artifact to be kept in a secluded location within its facilities. Furthermore, the finger could help form a natural barrier against cursed spirits, protecting the school and its students.
Hidden in Tokyo or beyond:

On the other hand, the finger may still be somewhere in Tokyo. Thus, during the events of the Shinjuku Showdown , Nobara tries to buy time by striking the finger, and it may still be there. Iconic locations like the Aoyama Cemetery or Dogenzaka Alley offer perfect hiding spots, keeping prying eyes away.
While the final finger doesn't pose an immediate threat, it could still play a crucial role in the future of the franchise, whether as a barrier against curses or a key item in potential future stories.
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