Nobunaga's Ambition: Kakushin with Power Up Kit was never officially translated into English. The only way for Western players to experience the full PK content is through fan-translated patches applied to a legitimate Japanese ISO.
For those looking to dive deeper into the series' mechanics, newer entries like Nobunaga’s Ambition: Awakening offer tutorials on build basics how to play nobunagasambitionkakushinwithpowerupkitrar verified
This is the "definitive" edition of Kakushin , adding features like the "Trial of the Master" mode, new technologies, and a scenario editor. Nobunaga's Ambition: Kakushin with Power Up Kit was