Shouhi Seikatsu-sha Tar-san
消費生活者ターさん · しょうひ せいかつしゃ たーさん
est. Rough estimate based on volume count, reprints and magazine — not an official figure
Overview
English language learning materials, hair removal, health foods... The Netai Ward Consumer Affairs Center in Tokyo continues to see a steady stream of people seeking advice on consumer-related issues. A half-naked man born in the jungle and raised by orangutans suddenly appears at this modern-day refuge and declares, "I'm going to become the king of consumer affairs!" (Source: Kodansha, translated)
Source: AniList
External databases: AniList
How to compare editions, collected volumes and ISBNs / Sources, updates and corrections