>>64170312 (OP)
Howa, Miroku, SKB are three off the top of my head. Most manufacturing is for internal military and police service and done at fairly low volume.
Howa makes some pretty decent and affordable bolt action rifles. Miroku is a bit more high $$ specializing in shotguns and lever action rifles sold by Browning, SKB only exports high end shotguns.
Japan is prohibited from exporting military firearms per their constitution and the terms of their surrender after WW2, so you aren't ever going to see them export a semi auto Type 89 for instance. Funny enough, they are also not allowed to sell their products to paramilitary forces including law enforcement. If a police agency in the US wants tactical Howa 1500s for their SWAT team for instance, they can't buy it from Howa directly. They have to get it through a 3rd party.
>>64171186
Vanguards are actually Howa 1500s imported in parallel with the Howa-branded rifles imported by LSI in Reno. They come from the same factory.