Even by today's standards, this is a startlingly dark, bleak, violent manga about a justice-seeking hitman and his associates. It has more than enough action, sinister bad guys, and occultish themes to satisfy any action manga fan.

This manga has several edition's:
Tankobon 1-20
1982: Original - Shueisha
2014: - [Manga no Kinjitou (Group Zero)](https://bookwalker.jp/series/144246)
2011: Digital - [B Komi](https://bookwalker.jp/series/24203/)
2021: - [Goma Books (Goma Books)](https://bookwalker.jp/series/327394/)

Gapponban 1-5: 2020 - [Group Zero](https://www.amazon.co.jp/%E3%83%96%E3%83%A9%E3%83%83%E3%82%AF%E3%83%BB%E3%82%A8%E3%83%B3%E3%82%B8%E3%82%A7%E3%83%AB%E3%82%BA%E3%80%90%E5%90%88%E6%9C%AC%E7%89%88%E3%80%91-1-%E5%B9%B3%E6%9D%BE-%E4%BC%B8%E4%BA%8C-ebook/dp/B08DF8XRTR)