crosbowman with strike would be too god? even vs samurai with tons of virtuese which you dont recognize as OP? interesting
The same could be said of the Zulu who get better stuff unless you get no less than 2-3 good virtues (Loyalty/Respect are awful), and that is assuming the second virtue isn't exactly the same as first, in which case the second virtue opportunity is wasted because they do not duplicate. Not to mention Japan is the warmonger coming online the latest*, which is pretty bad considering Authority is very reliant on early balling. Japan gets no help at that. Granted, you can go Progress though, it also works good for warmongers.
Additionally, Samurai with tons of virtues is basically two Uniques put together, just like my old pal, the Burial Tomb. Second virtue on a single unit usually RNGs itself in by around 10-15 cities and I've never had a third virtue before 20-30 cities, so you're not only talking about an unique - but an unique blessed by RNG enough so he didn't get Loyalty/Respect, has no wasted "duplicate" promo on an empire that already is very successful anyway for whom the UB's yields are not very significant at that point. By the time you have 20-30 cities, shouldn't you likely be in Renaissance or at least nearing it unless you went blindly wide while completely ignoring buildings? Either way, your Japan is going to be facing Tercio by this point. Compare them to Tercio made from Jaguars or Immortals.
*That's excluding France though, but it gets something from peace I guess so it's only a half warmonger? I don't know, it is just a weird civ, even the Chateau stopped being impressive after all the Ancient UIs got buffs making them do similar stuff which perhaps get less bang per tile, but are affecting way more tiles and are 2 eras earlier, while usually getting medieval/classical yield upgrades that make them not only keep up, but often overshadow the later ones. That is the case with probably all the medieval era UIs tho, early game ones are now often not only earlier and usually present on way more tiles, but are also very likely to even provide more yields per tile. Only Kasbah still rocks (but it really hates coasts), and Feitoria too I guess? But only if you count the Nau CS yields a part of it, and it does get decent in your lands only in mid-late Renaissance once you get its +yield techs there.