I came here for dinner last night with a friend and it met my eager expectations - was not below/did not succeed, but definitely worth checking out!
I have never had Japanese street food before so this was a great introduction to it. Between the two of us, we had the plain onigiri, the tuna onigiri, the takoyaki (essentially octopus fritters), nasu shigiyaki (japanese eggplant with chicken) and the chicken hearts cooked on the grill.
The plain onigiri was pretty meh, I would probably suggest getting the tuna one as my friend thought his had a lot of flavor comparatively to mine.
Both the takoyaki and nasu shigiyaki were really good! The takoyaki was crisp on the outside and more chewy on the inside served with shredded beets. The Nasu dish was simple, slightly sweet, but very good!
As for chicken hearts - YOLO and go for it. If you get over the texture it's really not bad ;)
Next time, I am definitely going to check out their drinks!