最さい初しょ

noun which may take the genitive case particle 'no', noun, adverb

first; beginning; outset

Refers to the very first time, the initial stage, or the start of something. Used as a noun, no-adjective, or adverb.

• 最さい初しょは緊きん張ちょうしていたが、すぐに慣なれた。

  I was nervous at first, but I soon got used to it.