@Khazimhir I think it depends when the brother realized he needed to make the journal, and what he thought was important to put in it. If it was to protect his remaining allies and friends, he may have even removed some information, just to be careful.
The Galactic Navy Officer Becomes an Adventurer
by Takuma Tomomasa , A_Itoh
Available on mangabuddy for reading, and for sale at https://www.amazon.com/dp/B0BT6V7CMM
by Takuma Tomomasa , A_Itoh
Available on mangabuddy for reading, and for sale at https://www.amazon.com/dp/B0BT6V7CMM