|The following is based on Fallout: New Vegas cut content and has not been confirmed by canon sources.|
In November 2053, Matsumoto approached Anthony House in a hallway, and continuously asked him if he was alright. This furthered Anthony's paranoia, who believed Matsumoto had been turned against him by his brother Robert. 
Matsumoto was to be mentioned in Fallout: New Vegas.
- ↑ H&H Tools Factory terminal entries: "Matsumoto cornered me in the hall like a wild animal today! Kept asking if I was all right, but I see the lies bubbling in his throat behind that sussurating smile. He knows. He must know. Has my brother gotten to him, too? Have to talk to Cindy-Lou, she always knows what to do.