Challenge Quest | Client | Reward | Task |
Help Us Transport a Cannon | Demon Defense Committee | 10,000 Macca | Bring the cannon to the client. |
Accept the Quest and check out the room beside the hunter association in Shinjuku. Exit Shinjuku and head northeast to find a gap in the crater wall.
Head to the east to find the relatively untouched building. You don’t have to enter it but check the marker behind it to get a portable mobile artillery piece. Take it back to the Shinjuku Shelter and hand it over to the man you talked to earlier to complete the Quest.