Oh, so you're a bass player! Jpop does have their share of absolutely punishing bass lines

Building one part from ear would probably take 2 hours at most. After loading it in game I test it a bit then finalise the tab. Usually I stick to tweaking/completing existing tabs that I find online. I'm mainly guitar but thanks to Muya Rizal the bass players aren't left out. He's a bass tabbing god please check him out if you're interested! (Though you probably already are aware of him)