How to say "chocolate" in Japanese

• チョコCommon
  nounThe same chocolate — the sweet or candy itself — but as the shortened form of チョコレート; it suits relaxed, everyday conversation, such as chatting with friends about snacks, and is not a different sweet.
  私はジムのためにチョコを買かった。↗

  I bought the chocolate for Jim.
• チョコレートCommon
  nounThe full word for chocolate as a food or sweet; since it is not a shortened form, it is the natural choice in writing, in shops, and in any setting.
  私のお気に入きにいりの味あじはチョコレートです。↗

  My favorite flavor is chocolate.

Both words refer to the same thing — chocolate as a food or sweet — so the choice is one of form: 「チョコレート」 is the full word and the safe default, while 「チョコ」 is its everyday abbreviation.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• チョコchocolate
• チョコレートchocolate
• ショコラchocolate