Carrying a Youngster on an Adult's Rear
This page is the CodyCross answer for the clue below from Train Travel, Group 719, Puzzle 2 (Shinjuku Station).
Question is: Carrying a Youngster on an Adult's Rear
and the answer is: PIGGYBACK
Word Meaning:
PIGGYBACK — On somebody's back or shoulders.
Definitions from Wiktionary.