I've been told that there are ample sources available in Japanese. I do not know the language unfortunately, so I can't dive into those. The closest I've seen are Taiko (by Eiji Yoshikawa) and a biography or two for Tokugawa Ieyasu by A.L Sadler and Stephen Turnbull (I believe), but I'm uncertain how accurate and up-to-date the scholarship of both are in regards to two of these famous figures.

The former seems more like a historical novel, and from what few threads of the past I can find of Turnbull's name here, there seems to be skepticism, though one thread did mention him going back and correcting himself on some things.

Failing that, are there any resources in English that can substitute literature (if there are none)? I'm interested in their daily life and who they were as people rather than just their accomplishments. Virtues and flaws all. Thank you for your time.