こんにちは（こんにちは、konnichiha）
- hello/good afternoon

こんにちは means "Hello" or "Good day" in Japanese. It's a general greeting used during the daytime, typically from around 10:00 AM or 11:00 AM until the evening.

⚫︎こんにちは！元気ですか？ Translation: Hello! How are you? ⚫︎こんにちは、お久しぶりです！ Translation: Hello, long time no see! ⚫︎こんにちは、田中さん。 Translation: Hello, Mr./Ms. Tanaka.

⚫︎You use こんにちは to greet someone when you meet them during the day. ⚫︎It's a polite and versatile greeting, suitable for various social situations. ⚫︎You can use it with people you know, as well as strangers. ⚫︎It’s generally not used very early in the morning or late at night.

⚫︎The word is written in hiragana as こんにちは. ⚫︎It doesn't have a Kanji form commonly used for this specific greeting. ⚫︎There are no variations in okurigana.

⚫︎There is no exact synonym for こんにちは but you could use a variation of the greeting, やあ (Yaa), which is an informal greeting.

⚫︎こんばんは (Konbanwa): "Good evening." ⚫︎おはようございます (Ohayou gozaimasu): "Good morning." ⚫︎さようなら (Sayounara): "Goodbye" (used when parting)

こんにちは、山田さん。今日はいい天気ですね。 ・Translation: Hello, Mr./Ms. Yamada. It's a nice day today. ・Explanation: This sentence uses こんにちは to start a conversation and then makes a casual comment about the weather.

こんにちは、何かお手伝いできることはありますか？ ・Translation: Hello, is there anything I can help you with? ・Explanation: Here, こんにちは is used to offer assistance after greeting someone.

The word こんにちは is derived from the phrase 今日は (konnichi wa), which literally means "as for today." The "wa" is the topic marker particle. This phrase was historically used as a greeting, evolving into its current form, こんにちは.