From Yahoo! News: Oddly Enough, who got it from UK Reuters, who apparently got it from Asahi (we’ll see if it ever shows up in my news feeds):
A 1,000 sq metre former bank vault under an office building in Otemachi, a central Tokyo business district, has been chosen as the site for a high-tech farm growing lettuce, tomatoes, herbs[,] strawberries and rice, the national daily Asahi said on Sunday.
The project is aimed at helping the Japanese capital’s jobless to train for careers in agriculture, the paper said.
Since they will be hydroponic farms, they could also help train future space explorers. (“We’re space explorers, and we need space!” -Keith, Voltron)
Personally, I think it would be cool to visit one. I hope they offer tours in the future.