Light novelist Akinari Matsuno, best known for harem series MM! (or EmuEmu!), has passed away, at the age of only 32.
Publisher Media Factory provides an obituary:
They state he “died suddenly” but provide no cause of death or allusion to illness or accident, which, when coupled with his relative youth, has lead to some not unreasonable speculation that he may have committed suicide (suicide is actually the leading cause of death for Japanese in their twenties and thirties).