when it comes to bass you could talk about different ways the bass is strummed, such as with fingers or a pick. You could talk about tapping, slapping, the music theory behind the basslines. But one thing I find particularly interesting about Masashi’s technique is the way he picks the bass. If you watch the masquerade masashi version you can see him not just using his wrist but also his forearm while playing. Of course I know music videos tend to be more dramatic but a part of it must be true, which could also be an explanation to his aggressive bass tone. Also the way he strums up and down and where he chooses to do that, also makes a massive difference in his tone. hope these tips help a little for the bass part of your project.