I've been running Ninja Gaiden 2 for DOS recently, and I was thinking that there should be a leaderboard in this series for that game, since other versions of Ninja Gaiden like Game Gear and Sega Master System are also on this page. I'm the only person who has run this version that I know of, but it's not inconceivable that someone else might be interested at some point.

My current time is a 32:22 () I start timing when you press escape on the opening cutscene, and end timing when the screen goes black after defeating the final boss.