出初め is read as でぞめ (dezome) and means debut.
でぞめ
dezome
でぞめしき
New Year firefighters' event
うぶだし
first appearance
はつひので
first sunrise of the year
しょにちがでる
to achieve one's first victory after a string of losses
しょにちをだす
はつしゅつじょう
debut
うぶだしひん
selling something for the first time
でかける
to be about to leave
しゅっさん
production (of goods)
しゅつえん
appearance (in a film, play, TV show, etc.)
しゅっせき
attendance
しゅつげん
appearance