当初 (とうしょ)beginning; start; outset

beginning; start; outsetnoun (common) (futsuumeishi), nouns which may take the genitive case particle 'no'
at first; at the beginning; initiallynoun (common) (futsuumeishi), adverb (fukushi)

当初, its kanji, and other words that share them.Open this graph

Kanji in 当初

当局とうきょくauthorities; relevant authorities
当時とうじat that time; in those days
当選とうせんbeing elected
当面とうめんcurrent; urgent
担当たんとうbeing in charge (of an area of responsibility); being responsible (for a work role, etc.)
本当ほんとうtruth; reality
当然とうぜんnatural; right
担当者たんとうしゃperson in charge (of an area of work); person responsible
初はつfirst; new
最初さいしょbeginning; outset
初日しょにちfirst day; opening day
初代しょだいfirst generation; founder
初戦しょせんfirst match (in a series)
初期しょきearly (days); initial stage
初旬しょじゅんfirst 10 days of the month
初演しょえんfirst performance

See how 当初 connects to the rest of Japanese.