The latest patch has been applied to the Steam version. Fixes and changes are as follows.

Adjustment of game balance
・Changed the strength of some enemy characters (Clone Yakuza Y-12 (yellow), Y-13 (white), etc.)
・The Ninja Slayer is now less slippery when moving.
・Reduced the amount of movement when Ninja Slayer is hit by an attack that blows him up.
・The gauge consumption of the dash attack has been reduced.
・The Ninja Slayer's normal attacks now have a larger judgment.
・The amount of movement speed increase in Naraku mode has been reduced.
・The amount of energy regenerated after exiting Naraku mode has been increased.
・Jitsu counts are now restored to maximum when restarting boss battles.
・The conditions for the secret mission in the Sonic Boom stage have been relaxed.

Bug Fixes
・Fixed a bug that made it difficult for Cloudbuster and Hellkite to hit.
・Fixed a bug that caused the restart point of the Iron Vice boss battle to be off and the player would fall.
・Fixed a bug that caused FPS to drop during Cloudbuster boss battles.
・Fixed a bug that prevented Notorious from reappearing in Notorious Battles.
・Fixed a bug that caused the Daedalus boss battle to become unprogressable.
・Fixed a bug that prevented the moving floor from working in some stages.
・Text corrections were made, including correcting Korean to the correct translation file.
・Some minor bugs have been fixed.