Alone in the Future World is the 6th chapter of Doraemon Volume 21.
With his friends all currently going on a summer trip with their family and Doraemon being busy, Nobita decides to go pay Sewashi a visit at the 22nd Century.
- Nobita Nobi
- Shizuka Minamoto
- Suneo Honekawa
- Suneo's mother
- Suneo's father
- Takeshi Gouda
- Sewashi Nobi
- Jumbo (first appearance)
- Suneo's great-great-grandson (first appearance)
- Sewashi's cousin (first appearance)
- Tamako Nobi
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