今日は "konnichi [wa]" and in the past meant "As for today" [今日] "konnichi" + [は] topic particle, in modern Japanese it is pronounced as "kyou wa" and only the Kana version is read as "konnichiwa".The reason is a sound change over the years "pa - ba - wa" to "ha", ...
Q:The most important greeting we use in Japanese isKonnichiwa. 聼起來自然嗎? A:it sounds 100% natural, though be careful putting Japanese words into English letters. I know most Americans would not pronounce "konnichiwa" correctly 😂