I see absolutely no alternative at this point to getting the legal authorities involved, immediately.

Ukyo's delays and evasions demonstrate that he cannot resolve this problem in a reasonable way.  

Frankly, I think the only thing we can expect now is for the truth of how he lost our money to come out, but if there is some left, it needs to be distributed according to a judge/trustee's direction.  And, in the truth coming out, we can learn enough to avoid a recurrence of this.  

Is Ukyo a thief or an failed businessman?  Did he spend the money we deposited or did he lose control of it?

Without the intervention of authority, Ukyo will continue to scramble and evade and things will get worse as he tries to dig his way out.