This is the 4395th most frequent Japanese word.
和一
"和一" is not a standard Japanese word. It might be a name or require context for interpretation.
Here, '和一' ('Kazuhito') is used as a person's name.
和一さんは日本語の先生です。
Mr. Kazuhito is a Japanese language teacher.
In this sentence, '和一' ('wa-itsu') metaphorically represents harmony or unity.
和一つに気持ちを込めて合唱しました。
We sang together with unity of feelings.
'和一' ('Kazuhito') refers to a specific individual character in a story, used as a proper noun.