Naoto,
A limited way of doing something similar (not quite) is using the old SUBST command which will give you a "drive" instead of a folder, and you are limited on how many you can have.
For example to create the virtual drive "V" pointing to some shared folder
SUBST v: \\YourServer\YourShare\YourPath
Now you can use v: as any regular drive, which is not exactly what you were asking for, but if you do not find something better it might help
[Update]
By the way, this would be different from mapping as you can also use it to local unshared paths, like
SUBST v: C:\YourPath
But you might also consider mapping?
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