I went on a tour with a small Yelp group and went for a "tour". I put "tour" in quotes because there's not really much to see. The tour consisted of:
a) Showing a few pictures and describing the process;
b) Standing in the store and looking at the small brewery
c) A few samples of sake.
Pros: Sake was good (though I had limited shots due to my weak alcohol tolerance) and the guide was very friendly.
Cons: Not much of a tour. A lot of the things they show you on how they make sake could be looked up on the Internet. Also, I would have preferred to see them making sake live as opposed to just the pictures.
Verdict: Come here for the sake, but don't expect a huge walk-around tour similar to the Steamwhistle brewery.