I ate in here a couple of times on my last trip to Japan in March 2013. It is really easy to find and the bus stops right across the road. The building is on a corner and you see the sign outside and go up the stairs to the top floor. Their opening times are listed here, but on my last trip to Japan they were unexpectedly closed for staff training, so this time I emailed ahead to check if they were planning any closures, which they weren't.
The soymilk ramen noodles are heavenly, and so filling. I prefer the one with vegetables than just with the tofu bits, as it's a more rounded meal than just soy, noodles and tofu. The gyoza is also very yummy and perfectly cooked. I also had some sakura cake, which was a strawberry and coconut cake - beautifully presented and so light.
The staff is lovely and helpful; they made me a teryaki tofu sandwich to take out for a long train journey I was going on, and were so helpful. I found the pound cake takeout a little dry, but maybe because I ate it the day after I bought it.
They have seasonal specials, which were all sakura related when I visited. They also do meal deals, but they aren't advertised in the menu, so do ask as they have them on a board there.
The area is full of students, so be prepared to walk carefully and stay alert so as not to be run over by the cycling students! The student population also seems to be the main clientele, so the place has a young and cool feel to it.
The staff speak some English, but were really great on the email and will do their best to help you. They have an English menu too.
It is quite expensive, but the food comes out really fast, is always great quality and delicious and the restaurant is very friendly, welcoming and impeccably clean.
Updated from previous review on Sunday April 28, 2013