This is self-published expansion kit for Dokuganryu Masamune. Rulebook and reference card from Hideyoshi Gunki or later game are needed. "Mutsu Nikki" means "Record of the Mutsu province". Covering battles in the Mutsu and Dewa provinces. Six scenarios are included in this kit. "Battle of Eiroku 1", "Battle of Eiroku 2", "Punitive expedition to Ooura" and "Battle of Minato" are short games for two players. "Three champions of Dewa" is a short three players game. "Mutsu Nikki" is a campaign game for three or four players.