The blue light of the laptop screen was the only thing illuminating Kenji’s cramped Tokyo apartment. It was 3:00 AM, the "witching hour" for J-Drama fans, when the latest simulcasts finally hit the servers.

His inbox chirped. It was a message from a college student in Brazil: "I started learning Japanese because of your reviews. I felt lonely until I watched the show you recommended. Thank you for showing us this world."

By morning, his review had gone viral. But it wasn't just the hits he covered. Kenji spent his afternoon at a colorful, chaotic "Idol Meet-and-Greet" in Akihabara. He watched as fans in coordinated outfits performed intricate wotagei dances for a girl group that hadn't even cracked the top 100 charts yet.