Hello.
Well, I´m not a botanic, just a gardener; but it seems to me like Phyllostachys aurea. For the leaf, the size, the way to grow and for the plane side.
I´ve not use this specie because of the plane side detail. But maybe it also makes good arrows.
I´ve used Pseudosasa japonica and another close to it specie whose I don´t know the name. And with both I´ve notice that they begin to be useful for an adult bow from 7 mm diameter at the smallest extreme. It will depend on many factors like how thick the wall is, how long the arrow or how heavy the broadhead, the actual draw weight and draw lenght, for example.