It's been a while since I've seen Ley Lines but I'll add my comments in this box once I've rewatched it.

Nihon kuroshakai (1999) Ley Lines

Okay just a few notes in addition to wpqx's concise comments, as noted this is the third in the Black society trilogy the connection being they all feature characters who are "Kuro Shakai", that is Chinese or part Chinese living in Japan. At the start we see the two brothers who are Kuro Shakai as little boys being told by Japanese children to go back to China. The films are about outsiders, not just from the viewpoint of the law but from the viewpoint of society.

The other films in the trilogy are Shinjuku Triad Society and Rainy Dog and will be commented on at some future date. 

A few of the cast are Miike regulars, in particular Tomorowo Taguchi, Sho Aikawa and Riki Takeuchi, each has appeared in many of his films including the Dead or Alive trilogy. The cinematographer ( as wpqx noted "This film was shot wonderfully well") is Naosuke Imaizumi, amongst his other credits are Miike's "The City of Last Souls" and "Shinjuku Triad Society". 

The brothers appear to have some sort of psychic connection at times of grave danger, there's a time where the eldest (and main protagonist) Ryuichi gets badly beaten, (his own fault) but somehow his brother seems to hear him though they're nowhere near each other and is able to find and help him. This link is made again towards the end of the film but this time in reverse.

Another thing that pops up in this film and a few others, not just Miike's is the connection between Japan and Brazil, I have no idea where it stems from but there is a definite affinity between the two nations, might be something worth looking into.

I'd say apart from the cinematography, this is pretty standard Miike fare, gangsters, pimps, prostitutes, crime and retribution although not usually by the hand of the law and a slightly introspective look at modern Japanese society.

Cheers Trev.