You can find satsumaimo at the save-on. It says "purple yam" but looks like Japanese sweet potatoes and taste like them.
They also sell "sweet potato" with yallowish skin which I thought it’s quite sweet as well.
The ones I’m talking about is really looks like Japanese sweet potato (the ones you see at Korean market) and it’s not purple inside, they just called them "purple yams".
If you doubt it, go to save-on and buy them....you know what I meant.