Although the PM-9 nomenclature is widely used among non-Japanese firearms communities, there have been no public records or confirmations of its official use.

[citation needed] The PM-9[3] is produced by the Nippon Miniature Bearing Company, otherwise known as Minebea.

A foregrip is mounted underneath the barrel of the PM-9 to aid fully automatic firing with a flash suppressor in place.

[7] It can also be modified to have a foldable stock, a detachable suppressor and a mounted reflex sight, though these modifications are most unlikely to be used in peacekeeping operations abroad, since such activities do not involve Japanese soldiers in combat situations.

[14] PM-9s were originally made with wooden pistol and foregrips; plastic is used on those currently in JSDF service.