There are 200 Mimans hidden throughout the four regions of Shin Megami Tensei V. This page will list the locations for the West Shinbashi area of the Minato region.
West Shinbashi is an area that is directly north of Kamiyacho, with not a clear line distinguishing the two. From the Kamiyacho Leyline, go northeast and get on the northern side of the perfectly square shaped building on your map. Up the hill a tiny bit will be the Miman.
From the previous Miman, slide down the hill and look for a lone tree right next to a ruined building you can enter, which will be just north of the two Tsuchigumo demons that are just north of the Leyline. This Miman will be inside of that ruined building.
Head for the northern portion of the game and just southeast of where the Abscess is/was, will be some remaining walls from a building. In the southeast corner of that little area will be the Miman, inside the “walls” of the building.
Find the northwestern corner of the area and look for the ledge you can climb that allows you to get on the standing highway. Once you do that, to go the northern end and you will find the Miman right out in the open, at the very end.
After collecting the previous Miman, follow the highway south and as it bends to the east, go all the way to the end of the highway to find this next Miman.
The final Miman in this area is a bit of a doozy, as it’s located near Jatayu’s nest. On the western side of the area, you can see a thin trail just southwest of where you can climb up to the highway. However, you want to be extremely cautious here, as the Jatayu flies around the area and it is level 25, meaning a battle with it will likely not end well. What you need to do is run to the top of the nest, then look over the eastern side to see the Miman on a rocky ledge. It is highly likely the Jatayu will spot you while doing this, so move quickly.