I’ve read some of the bollo*ks like everyone else, but I’ve also read more well
research books such as Kenji Tokitsu, William Scott Wilson and Alex Bennett. Also my Kendo club president (RIP) was the first to translate Gorin no who into English and we often discussed the man over a small glass of real ale; small because they were short discussions due to lack of credible data on him!
My distinct impression is that he did regret some of his behaviour as a young man; but that’s my unsubstantiated conjecture.
He was an interesting character leaving behind some amazing art and fascinating writings (although despite my
huge intellect, I find impenetrable, for a well-cited reason). I even have two versions of his wonderful Fudo Myōo carving.
But I’m not blinded by my admiration for his achievements; he’s not my perfect hero. You often have to read around a subject to get a better idea of who they were and that often leads to a greyness of opinion.
By way of example, if you read the popular story of the Forty Seven Rōnin (the Akō Incident) one gets the impression of heroic figures avenging the unjust death of their lord Asanō. Then you read Hagakure and see a bit of a criticism of their conduct and you think, ‘hang on a second…’. Then you read several contemporaneous
historical accounts and you realise that their behaviour was an attempt to remain in employment after their clan was disbanded and the order for them to commit seppuku was just, considering their
crime! Lord Asanō was too busy ‘chasing skirt’, drinking and neglecting his feifdom rather than practising swordsmanship etc which is why he was unable to kill Kira with a sword…from behind!
And Kira was a decent man too!
So you must read credible, researched accounts which is what I try to do! It can be exhausting, which is why people don’t bother.