This, in my opinion, is THE BEST contemporary Japanese movie that I've seen thus far, and I've watched a lot. LOVE IT. Takayuki Yamada is a stellar actor. Check him out in Tegami (The Letter) too. I watch this movie on a regular basis.
The fact that it is actually based on a true story makes it that much better to watch. The forum-goers pushing Densha Otoko along for his sake and their own was also inspiring. Entertaining and funny at times. Grade A enjoyment.