Upvote:0
No. They will cancel your second flight if you don't take the first leg. Google "Hidden City ticketing" for more details.
However, if you have a single ticket, than Alitalia has full responsibility to ge your to your destination. If you miss your connection, they will rebook you for free and possibly put you up in a hotel for the night. The shuttle from Linate to Malpenza takes between and 1 and 1.5 hours (depending on time of day) so it doesn't seem impossible. Does your ticket include the shuttle ride? I would also assume that Alitalia checks your bags through, so they would have to get those to Malpenza as well. If you are worried about the connection time, contact Alitalia and talk it through with them. The may be able to rebook you an on earlier flight for free.
Upvote:1
Usually not. As soon as you miss the first flight, the rest of your itinerary is cancelled.
You should probably contact Alitalia and try to change your itinerary to just be MXP-Tokyo.