I've been thinking of this film these past few weeks for some reason. I remember shopping at SUNCOAST Video store just as they were shutting down and seeing on the shelf the cool "_Doppelganger_" title on the DVD cover with its Tartan Asia Extreme label atop. I recognize the main actor since I had seen him in the director Kiyoshi Kurosawa's other films. _Doppelganger_ is a slow-paced thriller about a man, an inventor who works in the field of robotics, who deals with what seems to be a double evil/psycho version of himself. You can tell which one is the bad one by his actions and how he always seem to whistle that same song. I'm not quite sure what the song is, but there's a piano version of it played in background at one point. The odd melody reminds me of _Totaka's Song_ that's hidden in plenty of Nintendo games (such as _Animal Crossing_) by its in-house composer. Overall, it's not an outstanding film, but it's neat to see how the technique of double exposure was used to achieve the effect. I'd recommend Kurosawa's other similar but much better thriller called _CURE_ (1997), and if you're more into the horror side of things, do check his _PULSE_ (2001), _Seance_ (2000), and _Sweet Home_ (1989) released to coincide with the Capcom game of the same name. He has a new one on the way called _CREEPY_ (2016).