Two things about the Time Room episode

In this episode, the Time Machine isn't working so Doraemon uses the Time Room gadget to go to the past. He enters the year 1955 and at that time, Nobita's father Nobisuke is 10 years old. In the Hindi dub, Doraemon says they've come 54 years into the past, so that indicates this episode was aired in 2009 over here. Similarly in the Chinese dub, he says 47 years, so it aired in 2002 over there. In Japan, this episode aired in 1988... I wonder if he said they've gone 33 years back

Unfortunately I couldn't find the Japanese version... But if he did say 33 years, that would mean Nobisuke is 43 years old in present time (but I feel he's in his late 30s)

Also, there's a scene where Nobisuke is shown with Gian's father and Suneo's father when they're all young, they look like they have the same dynamic with each other as Gian, Suneo and Nobita. Interesting that we never see them interact in present time.