And if you don't have a pair of raw denim yet, their Made In Japan ones are a great value. It's hard to say with Uniqlo because it's goal is to cover all the basics. I mean...
A few flannels.
A few oxfords and nicer shirts.
Socks, underwear, and belts in black and brown.
Add shoes and outerwear, and you're on your way to a decent wardrobe. A bit plain, but gives you a good foundation to experiment with.
Good stuff, having a plain wardrobe to start with is a good choice imo. From that point you can start adding in your own taste and develop your own style. Instead of buying hyped flair items and working from there, where you will just end up looking like everyone else on this forum.