noun
blue tag; blue card; blue ticket
Refers to a physical blue-colored tag, card, or ticket, often used in contexts like second-class train tickets (compare 青切符) or other color-coded systems.
See also: 青切符
昔の国鉄では、青札が二等車の切符だった。
In the old national railway, a blue ticket was a second-class ticket.
noun
batons (playing card suit)
In traditional Japanese gambling decks (e.g., hanafuda-related games), 青札 refers to the suit of batons or clubs, typically colored blue.
花札では、青札は杖の札を指すことがある。
In hanafuda, 青札 can refer to the batons suit.