What's the name of Alaban Building Mountain City?

The mountain town of Alasaka Saburo I got is really cool. Don't go directly to the window after Saburo's death. Go to the second floor. At this time, the double doors on the second floor have been opened. You can go to the roof. Saburo is in the helicopter. Kill the bodyguard and rescue the mountain city from the helicopter. Right in front is the immortal pistol, and going upstairs to the apron is the sleep in the mountain city. If it is too bright to see clearly when you go to the tarmac, you can choose the time in the menu to jump to the evening.