Mushihimesama (Japanese: 虫姫さま, "Bug Princess") is a manic shooter developed by Cave, originally distributed by AMI in 2004 and later redistributed to arcades in 2011 as the significantly changed "version 1.5".

The world of Mushihimesama is a wild, untainted one where large desertic areas abruptly change into lush forests, all inhabited by arthropods called Koujuu: such beasts (basically oversized insects) are capable of surviving due to their hardened shells and, upon their deaths, leave them behind for vegetation to grow around them, in a natural cycle of life and death.

However, the daughter of the royal family, Reco, is apparently the next in line after being given an ornate bracelet by a mysterious boy in Shinju Forest, where she lost herself at a young age: by the day she turns 15, the Miasma contaminates the village.

Cave ported Mushihimesama to iOS platforms under the title Bug Princess, which was released on December 15, 2011.

Additionally, whereas the Xbox 360 port was region-locked to NTSC-J hardware, the Steam version is an international release with no region restrictions.

[7] Destructoid gave the PC version a score of 9/10, referring to it as a "must play" title and "required reading for shmup fans" and concluding that, "solo or with a friend, on the highest difficulty setting or the lowest, Mushihimesama is incredibly easy to spend an afternoon with for years to come.

"[9] Hardcore Gamer gave the title 4.5/5, referring to it as "a classic shooter" that is "beautiful on the surface, but a master class in how to create a challenge that varies in difficulty from completely accessible to utterly insane", stating that the "sheer volume of content is fantastic, making it as easy to replay a mode over and over", and concluding it to be "a phenomenal arcade game and an indispensable addition to any shooter fan’s library.