This is Hishozame (Flying Shark/Sky Shark) by Kaneko/Toaplan for the Sharp X68000, a Japanese boxed set including the game disk(s), manual, and box.
Used and working — the title screen was confirmed to display when tested. Some mold was previously removed from the disk surface (not a professional cleaning), so the disk may occasionally show a read error on some X68000 units. The manual and box are original with some damage, and the case's clear vinyl film has tears and wrinkles at the spine and corners. Disks retain their original labels and sleeves.
