The Japanese are pretty good at close combat but not so good at shooting from my experince, they also get access to very cheap suicide Anti tank squads.
I would recomend looking at the starter sets here
http://store.warlordgames.com/collections/bolt-action-starter-sets the ones that go for £80 those all have enough for 1000 points which is the upper limit that most people play at. You'll also need to pick up a rule book and eventually the Armies of whichever nation you choose. I'd also recomend taking a look at this site
http://boltaction.easyarmy.com/ It's a very good list builder that shows all of the different Theater selectors aswell as the generic ones for all of the diffrent nations and it puts any special rules for individual squads in their entry.
Lewis