The following "max" statistics refer to writers at 18/20 blossoming (not including the special outfit and voice clip node) and level 50, with no memoria cards equipped.
- His real name is Mori Rintarou.
- He was a student of Japanese, Chinese, and Western literary traditions, and translated foreign literature. He read in German, Japanese, Dutch, and Chinese.
- He was sent abroad to Germany from 1885 to 1888, and was devoted to advanced training in the medical field. During this time, he kept four diaries and amassed "a collection of hundred seventy volumes of Western books during the first year alone of his sojourn." 
- Once he was back in Japan, he published his first poetry book (Omokage, 1889) and the short story Maihime (The Dancing Girl, 1890).
- In 1885 Tsubouchi Shouyou started publishing a series of essays called Shousetsu Shinzui (The Essence of the Novel), in wich he argued that the current Japanese fiction was either sensational or dull and moralizing, but it could be transformed by making realism - rather than didacticism - the aim of characterization and plot. 
Ougai couldn't agree with this, since for him it was irresponsable to let a work of fiction be moved only by realism, and responded negatively to Tsubouchi's essays - insisting that literature could not function without its ideals being evident to the readers. 
This started an important debate know as The Dispute on Hidden Ideas. 
- Ougai held many tanka parties which were attended by several prominent poets of the time.
- In 1909 he helped establish a literary magazine, Subaru, which succeeded Myoujou: at first he was the general adviser, but two years later he replaced Ishikawa Takuboku as an editor. 
Subaru was mostly characterized by the hedonistic and sensual tanka of his contributors, but it also printed poetry in other forms, plays, and even novels. Ougai published Seinen (Young Men, 1910) and Gan (The Wild Geese, 1911–13) in the magazine.
- Ougai was very dismissive of the Naturalist movement that was popular in Japan and Europe at the time, feeling that it was too concentrated on pornography and crude realism.
In 1909 he published the novel Vita Sexualis: a coming-of-age story in which his main character describes his own sexual development, but also a way for Ougai to openly dismiss Naturalism's principles.
After a month of his publication, Japanese authorities deemed the story too sexual and dangerous to public morals, making the whole seventh issue of Subaru out of print due to censorship. 
- Ougai was also known for his essays and nonfiction writing, which included historical biographies.
- In an essay titled My Standpoint, he stated he did not care to be compared to his contemporaries.
- Ougai served as the Surgeon General of the Japanese Army during the Russo-Japanese war. He misdiagnosed beriberi and refused to accept the dietary treatment, allowing tens of thousands to die. He retired from the Japanese army in 1916, and became head of the Imperial Museum and chief librarian in 1917. 
- Nagai Kafuu considered Ougai to be his mentor.
- Akutagawa Ryuunosuke contributed to Ougai's writing of Saiki Koi, a biography. Mori interviewed him about Saiki Koi, and they exchanged letters.
- He died at age 60 due to renal atrophy, pulmonary tuberculosis.
- The Incident at Sakai and Other Stories, Dilworth & Rimer, 1977
- Shousetsu Shinzui: The Essense Of The Novel, Tsubouchi Shouyou, translated by: Nanette Twine, 1981
- Japan's Modern Theatre: A Century of Change and Continuity, Brian Powell, 2013
- A History of Modern Japanese Aesthetics - Volume 57, Michael F. Marra, 2001
- Dawn to the West: A History of Japanese Literature, Donald Keene, 1999
- Mori Ōgai and the Beriberi Dispute, Alexander Bay, 2011