>>536823893
You didn't tell us how long the walk home is or even what time it is. I see there's a hint in the presence of his next-door neighbor, indicating that he's probably not far enough from home to need a train ride back. It seems reasonable to assume that this is taking place after the workday, and if that's the case then Takashi may very well be stopping at the grocery store on his way home. Japanese zoning laws allow for housing, small shops, and schools to be in the same zone, and if that's the case then Takashi is probably not very far from home, let's say twenty minutes at most. The Japanese school day typically ends at 4 PM, but if Takashi has a reputation for being reliable then it's likely he has club activities in which case he probably left at 6. Let's say 20 minutes to the store, 10 minutes to pick up a few fruits during busy hours, and 20 minutes home. In that case, Takashi should be home by 6:50 PM.