DonPachi (首領蜂) is a "bullet hell" shooter developed by Cave and released in arcades in November 1995. It was subsequently brought to the Sega Saturn in the following year. It is the first in the DonPachi series and was not released outside of Japan. The name roughly translates to "leader bee".
DonPachi is often credited for popularising the "bullet hell" shoot-'em-up sub-genre, which has the player constantly focus on enemy and bullet patterns, attempting not to be killed. As the enemies in DonPachi often fire huge amounts of bullets in all sorts of directions, it requires a lot of memorisation and skill in order to complete.
DonPachi was followed by DoDonPachi, which saw a Sega Saturn release in 1997.