one's youth; one's youthful days (years); the flower of one's youth; the springtime of one's life
puberty; adolescence; youth
youthful crowd; crowd of young people coming into their own
Seishun 18 ticket; seasonally available railway ticket for 5 days of unlimited travel on non-Shinkansen JR trains
Seishun 18 ticket; seasonally available railway ticket for 5 days of unlimited travel on non-Shinkansen JR trains
Seishun 18 ticket; seasonally available railway ticket for 5 days of unlimited travel on non-Shinkansen JR trains
Seishun 18 ticket; seasonally available railway ticket for 5 days of unlimited travel on non-Shinkansen JR trains