Time Dilation Chamber

The Time Dilation Chamber is a unique dimensional space contained within a unique building within Yoshigakure. It's linked to the building by a unique door, and houses food and rooms available to all those that are currently training within it.

A unique dimensional space created for shinobi seeking immense training in a short amount of time. Time within this place is unique in itself, as it passes by second for second, but what makes it stand out is that 1 hour in normal time is is equivalent to 48 hours within the chamber. Being in this chamber for long periods of time won't age the one inside at an accelerated rate, but will allow for one to gain a significant amount of experience in a relatively short amount of time. Hair seems to be the only part of the body that grows at a fast rate, as if it was growing in accordance with normal time itself. The entirety of the chamber is full of Yin-Yang Release chakra, giving earned experience to the users spiritually while preserving their body physically. Shiro and Shira used this chamber a lot to train together, both having 900 normal hours of use, with is equivalent to 5 years worth of training within the chamber, in various arts. They achieved this feat in 37.5 days. They met three days a month across 12 months to complete this training. During this training, they works on various arts, including their kekkei genkai technique, Body Unification and spent a great amount of time fused together as Shiroa.

Facts
7.5 days in real time equals 1 year within the chamber.
 * 1 hours in real time equals 2 days within the chamber.
 * 15 hours in real time equals 30 days within the chamber.
 * 37.5 days in real time = 5 years within the chamber.