My friend from japan told me we cannot go in 5:00 without reservation . Is that true ? We have three people needed eat at your restaurant today

You just go in, get a number. They call your number, you tell them your order. Once your table is ready, they call you again.

I doubt that's accurate. Unless they're booked for an event. I'd call and find out but you can usually just walk in, order, and wait to be seated in the bar area

I am not sure about that you might want to call them and make reservations lunch is really good time to go