The Ki-32, or 九八式軽爆撃機 (Type 98 light bomber), was a light bomber used the IJA starting in 1937, with a total of 854 being produced before production was halted. This bomber was two-seated, a pilot and rear gunner, the pilot with a 7.7mm machine gun with 200 rounds total, and the rear gunner with a dual barreled 7.7mm machine gun with 540 rounds. The payload options which it can carry in War Thunder are either nine 50kg bombs or four 100kg bombs, but I think both would work on BR1, since for context, the Potez 633 has dual 200 Kg bombs. I think this would be an interesting option to give Japan a proper BR1 attacker aircraft instead of the depressing floatplane it has, and one that would airspawn as well, since it was an Army plane.
Tanks can survive direct hits from >500kg of bombs… the 50kgs are the worst for this you have absolutely no chance at killing a moving tank and the tanker simply needs to move after hearing you or bomb drop given you don’t drop from high enough.
Don’t know of any german 100 kg but i’d much rather have the bredas payload… also when you drop them all you have more of a spread which doesn’t help at all when they have the minimal power.