I've had the same problem with my Abysinnian and yes they went for the new leaves too. I guess they are more tender and easier to munch on, maybe? I knew it was some bugs, but didn't know what they were exactly since I didn't see them. I grabbed a bottle of my "Garden Safe" insect spray (which is meant to kill all stages of insects including eggs) and sprayed on the new leaves and those affected on both sides. I only sprayed a couple of times. It's been a month since and my new leaves are fine now, so I presumed they're gone. If you have something similar on hand, may be worth a try. Hope you can save your basjoo from further damage soon.

josh
Go get you some schultz 3 in 1 fungicide it works !

Thanks alot guys I'll look into those. I havent been on in a few days.