/jp/ - Otaku Culture

Just to illustrate look at this. Green are yaku you can't build towards, that are just luck. Orange are upgrades from other yaku that just award more points and black are pretty rare. San ankou is oftentimes also just toitoi, but I doubt a newbie will use san ankou without toitoi as the winning yaku.

You only really need to learn a handful of yaku to win hands, the rest is just for optimization.