While it was true that Sasuke could very well have stabbed Japan at any point in their conversation thus far, Sasuke was still bemused as to what the man thought standing on one foot was going to accomplish to prevent it. Had he planned to fall backwards and somehow recover into a counterattack? It was hardly a recommendation for fighting skills.

Nor was the apparent difficulty the man was having with whatever he was carrying -- perhaps a sword, as the answer to Sasuke's question suggested -- but what the hell was a 'Constitution'? Sasuke had only ever heard the word used with regard to health (and very long ago at that, indistinct memories of elderly relatives cheerfully congratulating his mother on her second son's apparently excellent constitution).

But if Japan was trying to say that his health limited his combat skills, he certainly wasn't going about it in a coherent way. If Sasuke had had more time on hand, he would have made a point of discovering more cogently what skills this patient had to offer, but as it were ...

"I assume that means you are competent with one," he said finally, deciding not to comment on the fact that one's countrymen's use of swords didn't necessarily relate to one's own competence. If all Konoha-nin shared skills ... Sasuke shuddered somewhat to think of the effect. "You may come with me."