lunchtime yatais near Yurakucho station?

[kamiosaki]

This month's issue of Otona No Shumatsu has an article in it about a fleet of lunch trucks/yatais that set up shop on weekdays on a lot outside the Kokusai Forum building near the tracks between JR Yurakucho Station and Tokyo Station. Has anyone ever been there, anything worth getting on the train at lunchtime for?

[tokyofoodcast]

I have had some lunch there, but I do not remember anything particularly so good to be worth traveling just for lunch. It is a bit open air and nice on a nice spring day, I imagine. I am curious to find out if any frequent visitors from the area will have some recommendations?