Overview
Kitan Iwanaga was released in 2007.
Is an indie Bullet Hell Shoot 'em Up developed by uturobune (otherwise known as "buster", seemingly a different person from the creator of Meikyuujou Hydra and others).
Gameplay is usually described as a combination of Alien Soldier and Sin and Punishment with a healthy dose of Bullet Hell. Each difficulty level is effectively a different game, or at the very least, has different bosses and stages in some parts while being of roughly equivalent length.