i think what hikaru can do is to join music festivals and whatnot so she could showcase her new material to a wider audience. touring the states is very difficult considering its a hundred times bigger than japan (united 2006 tour which she performed twice per location).

what they can also do is make more videos for the song to further the promotion.

its a business and if hikaru is going to do a tour in the US, they will make sure that they will not lose out financially with it. if there is little demand for the tour, i think it won't happen.

although im a very big fan of hikaru and would definitely go to a concert if there ever is one. go! go! hikaru!