When you think of murder mystery protagonists, you probably picture history’s greats, like the sharp and observant Sherlock Holmes, or the unrelenting Hercule Poirot, but Naomi Hirahara’s Mas Arai is a special case. This elderly Hiroshima survivor is an unlikely hero, but all the stronger for it, and Sayonara Slam, coming in 10th on our list for 2020, is all the stronger for his quirks.