Reference
Exactly what Japanese can train, build and research, by age.
Infantry civilization
•Mills, Lumber- and Mining Camps cost -50%
•Infantry attacks +33% faster starting in Feudal Age
•Cavalry Archers +2 attack vs. Ranged Soldiers (except Skirmishers)
•Fishing Ships work +5/10/15/20% faster in Dark/Feudal/Castle/Imperial Age; +100% HP
Team bonusGalley-line +4 line of sight
50 units · 28 buildings · 75 technologies. Each building carries what it trains and researches; upgrades sit under what they upgrade from.