Very interesting. That is a big step in creating the proper infrastructure to facilitate EVs. I question what they mean by "in a way already a denser network than the 34,000 gas station we have in the country."
What do they mean by "in a way"? I don't think that it is actually true that there is a better charging infrastructure than gas station infrastructure in Japan.
If they are counting just the special chargers, then they have the upper hand. But over 60% of homes in the U.S. have an external outlet available, and many of those who don't can use one in a parking garage. So we have millions of "charging stations" for our EVs. As for me, I have two 120 VAC outlets for Level 1 and a dedicated Level 2 (registered at PlugShare.com) for my EV if I can buy one.
BTW, in most EVs, including the Volt, the "charger" is in the EV itself as the EVSE is just an intelligent extension.