As dusk falls across Japan’s cities, a sense of unease falls upon many women on their journeys home.Reports of brutal femicides have struck a deep chord, fuelling a surge in the purchase of self-defence items – even as legal experts warn that arming oneself may come at a cost.The recent killing of Megumi Katayama, 24, who was stabbed multiple times by a stranger in a Kobe residential lift last month, has stoked public concern.Social media platforms buzzed with messages urging women to take...