

Speaking about the picture, the A1 exit is on the left side.
When you go upstairs from the A1 exit, you will get out to the zelkova tree road.
Walk for 5 mins while looking at the Omotesando Hills on the opposite side.
Make a left on the road that you will find next to the Dior shop.
Make a right on the first corner. You are almost to the store!
Soon after that, you will find a big signboard of an engagement ring, Sakura-Ichirin on your right side.