Four out of five may be a bit high, but it's for the value. We paid just under 6000yen for two people during a busy weekend in Nagoya (Nagoya and Osu Festivals were on). As others said, this hotel is just a few minutes from Marunouchi station (Red Line/Sakudori Line) and a little more from Fushimi Station (Yellow and Blue lines/Higashiyama and Tsurumai lines).
The room is small - as usual for Japanese business hotels. However, it was clean, everythings worked fine, and there was a nice sliding panel over the window to block the morning sun far better than curtains would. On top of this, there was a pretty awesome breakfast included in the price: salad, potato salad, boiled eggs, juice, coffee and tea, and about 9 different kinds of bread. On top of that, you could make your own "Ogura Toast" ("anko" sweet bean paste with margarine on toast) there - a real Nagoya specialty. If you like Ogura/Anko (and I do), give it a try. It's great!