When the weekend comes along, Henry goes through Nihonmachi to look at the various buildings from his childhood, and then he goes to Sea Fortune Restaurant in Chinatown to meet Marty for lunch.
Marty immediately wants to know what's up with his father; he can sense something is wrong and that Henry's been acting different. He's worried that Henry isn't doing anything to pass his days and is depressed.
To divert the conversation, Henry tells Marty that he's the one who looks like he has something on his mind, which immediately shuts his son up. These two don't always have the best father-son communication.
From here they just lapse into silence while they wait for their food to arrive. Awkward.