I was surprised to find there are three Japanese food carts next to the new Bridgeport Canada Line station, in a small parking lot at the south-west side.
One makes cold salad noodle bowls, I didn't try that one.
One makes giant takoyaki; made with good fresh shrimp, squid and a quail egg and a side of bonito, with a choice of mayo sauce. $5.00 and very good. They also make a black current ice desert.
The third makes only temaki, in small ($3.50) , medium ($5.00) or very large ($8.50), with a choice of fillings (I had salmon and hamachi with cucumber, tobiko and spicy sauce). Excellent fresh fish and again, very good.
Good value and recommended if you are in the area.