I wouldn't recommend planting under power lines. There are all kinds of reasons people might be out in those cleared areas. And i would think most people know what cannabis is, even if they haven't seen one before. Japanese people are pretty smart, so you might get screwed.

If you do end up planting under power lines, don't bend the plants. That's a surefire way to get them looked at. Anything unnatural draws attention.

Let us know how things progress.