Good call Harto,
I am in full agreement with your comments, but there is an illustration in Vol 1 of The History of Japanese Armour by Ritta Nakanishi, showing something not a million miles away from the model's armour. (sorry, tried to include an attachment but it didn't work).
Although most of my sources would back up your comments, Nakanishi's text comments that, "The Kurenai-odoshi Doumaru-yoroi used by Minamoto-no-Yoshitsune is thought to be (have been) a transitive example of the evolution from O yoroi to Domaru armour". In other words, these armours were not regulated, and development from one style to another did not suddenly happen overnight. As long as the direction of the timeline is not abused, any combination of armour styles available at the time could surely have been adapted. Is it such a great stretch of the imagination to supose that a tailor-made 'cuirass' could have been manufactured to order, in a style more accomodating for a woman to use?
I am also of same opinion that Tomoe Gozen would have probably worn The O yoroi, but I don't think the armour depicted by the model is by any means "impossible."
I am unaware that any reliable examples of Tomoe Gozen's armour actually exists, and her reputation and fame have been partially fableised and much romantisised anyway, in say the fashion that Boudicca has, so what is real and what is imagined? I have seen a number of Japanese illustrations of her, as well as many re-enactment pictures, all of which vary greatly. If the Japanese people are ready to play freely with image of their national heroines, should we be that bothered about specific acuracy in this one instance anyway?
The 'trousers' do however also look odd to me, but they could always be built up with epoxy putty - yeah I know -you shouldn't have to at these prices! The bow string reel could also be removed. For such a lovely figure, I think I'll still be tempted to buy one, with a view to doing some adaptations of my own.
Would love to hear from someone else with more definative info on the sculpt, or the source matter.