This. Place. Is. Loud.
My colleague and I shouted at each other for the whole lunch. The food was average but it seems that many of the folks who work here are real Japanese people.
If you have a reservation, there is a nice, quieter section on the 'patio' which is really a see through wooden lattice separating some tables from the madding crowd.
What I did like was the fast, friendly service and the Yama Moto Yama tea. Something that was slightly annoying was that my colleague had to go up to pay because their other machines were in use. A mild inconvenience to an otherwise standard Toronto lunch.
I won't miss this place if it goes away but it is a fixture for now in Scotia Plaza.