He's had a fair few as an amateur, including a number against Naoya's little brother. For me- Naoya Kosei Gonzalez Though I will ALWAYS make sure to watch any fight featuring Koki Eto...
Why should anyone think something about this one? :conf Those are 3 good and much mentioned names in this thread.
Yeah some of his amateur stuff and all of his pro stuff is on the Asianboxing video section. Unless you mean the Inoue bouts, only seen one of them so far. A link to all of his pro fights and some of his amateur stuff is here- http://www.asianboxing.info/videos/category/kosei-tanaka