I found my japs very very hardy to everything but subzero temps. Wonderful little bantams. Very easy to tame, not bad layers, don't go broody real often but good moms when they do, and I've yet to hear of a truly agressive jap roo. If you don't live in a really cold climate or have a draft free coop you can put a heat lamp up in they are a good choice.
From ideal I also wanted some of their bantam araucanas for mini blue eggs and dutch bantams which are much more cold hardy than japs but around the same size and still an easy going temperament. Dutch bantams can be hard to find which is actually the reason I was considering putting together an order.
