In this case, it is to look at the potential for them to purchase our clean, affordable natural gas to power their economy. See this brief write-up in the Albuquerque Business First.
What is not touched on in the article is that the Obama Administration needs to approve exports of LNG in order for some of the infrastructure to be developed for such exports. According to the Washington Post, it does appear that the Administration is leaning towards support of exports, but such support is not guaranteed.
As I write here, the benefits of exports far outweigh the potential negatives (if there even are any).
So, welcome to the Japanese delegation and kudos in particular to Michi Takahashi and the folks at New Mexico Solar Station for organizing this delegation. Hopefully Washington can get its act together to allow nations eager to purchase our natural gas bounty to do so.