Yakuza War: Japanese Godfather
International Gangs of Kobe
Torakku Yarô: Bakusô Ichibanboshi
The Yakuza Papers, Vol. 4: Police Tactics
The Yakuza Papers, Vol. 2: Deadly Fight in Hiroshima
Batallas sin honor ni humanidad
The Yakuza Papers, Vol. 3: Proxy War