It's no secret that Japanese planes are some of the least used in War Thunder (as of version 1.39 at least). Generally speaking, the aircraft of the Rising Sun are under powered with unimpressive bomb loads (not to mention lightly armed and armored). Needless to say you're probably going to be handicapping yourself when playing as Japan. That said, there are some basic strategies and tactics that can be employed to give players of this faction a fighting chance. Let's begin by talking about the tier one planes.
One final thing I want to mention has to do with bomb selection. At first glance it appears that Japanese bombers have redundant choices when it comes to bombs of equal weight. However, there are important differences in that one type of bomb is armor piercing while the other is high explosive. Generally speaking the former is for attacking ships and the latter is best when bombing ground targets. So plan accordingly for maximum effect on the battlefield. I'm going to stop here, but look for beginners guide to tier 2 Japanese aircraft in the near future. Until then...Sayonara!