Meanings

first Serpent day of the year

beginning

first year of Meiji era

elementary mathematics

maiden flight (e.g. of an aircraft)

first match (in a series)

pitcher's first pitch (to batter, or in the game)

first offender

first year

first championship win (esp. sumo)

first tournament for a wrestler

comic sumo performance

to achieve one's first victory after a string of losses

(very) beginning

first print (run)

first (of its kind) in Japan

the first generation of a family

world's first

for the first time in one's life

temporary