Hi Jack,
I recommend you contact some of his American students, such as James Williams or some of the fellows at the San Antonio dojo. I'm sure that they can get you pointed in the right direction.
Good luck with your search. A training partner of mine got a chance to meet Kuroda Sensei at an aiki expo event and even experience his jujutsu technique first-hand. My friend is pretty hard to impress but he seemed downright stunned by Kuroda Sensei.
David Sims
"Cuius testiculos habes, habeas cardia et cerebellum." - Terry Pratchet
My opinion is, in all likelihood, worth exactly what you are paying for it.