Karen James, looking, in Japan

At a folk art museum in Fukuoka, Karen James found a model and an illustration. I would say "hand cart," and they're similar to one another. Does anyone know what might be in barrels that size? The captions below are Karen's, from her blog entry Last Day in Fukuoka:

I haven't found any real wheelbarrows, Sandra, but I did find this model one.

And this one illustrated on a wall. Unfortunately there was a poster in the way on the bottom right. I'll still keep my eyes peeled for the real thing.