I think you're maybe focusing too much on making it look generic anime-ish instead of looking at Hideo Kojima's actual facial features. The things that need the most work at the moment are:
- The shape of the face. You have made his jaw very narrow. The actual face is much rounder at the jaw.
- The mouth. There is nothing wrong with drawing the actual shapes of the lips, like you would on a girl... instead of the kinda "lines + shadow" thing that you're doing and that is common in different anime styles.
- Eyes. They are looking pretty good, but they are not aligned, and Hideo's eyes are a bit smaller and more narrow.
- Nose needs alot of work. It looks a bit broken now. Don't be afraid of making it too big!
Otherwise: nice work, and keep it up!