I actually met Tatsuya on facebook and he gave me a link to one of his works. It's really awesome how he can play the guitar so softly and smoothly. He's definitely an artist worth checking out.

This one is called Position of Love in the Equation / Tatsuya Dejima 「数式に記された愛II／出嶌達也」.
Here's the link to his youtube video: https://www.youtube.com/watch?v=BeN4RhzfHvY

Enjoy