JFF Theatre is a fantastic source for J-films. They offer a new roster of films every three months - all free and legal. You just need a free account. They tend towards coming of age and anything about food. Sometimes other traditional Japanese arts. Plus other films which are hard to categorise.
They've just started adding in new films off the quarterly schedule though, which is a bit confusing. A few are geo-restricted.
Keep an eye on their end dates though and don't cut it too close if you really want to see a title. Depending on where you live they might expire before you expect them to.
This is the custom list I keep for JFF, if you want an easy way to look up titles on MDL or see what they've offered in the past. The current selection begins with number 36.