How to Say "Today" in Japanese

今日

kyō[kõ̞ɲ̟ːit͡ɕi]

The Japanese word for today is 今日 (kyō). Wiktionary also lists 本日 (honjitsu).

Meaning: on the current day (adv)

Ways to say it

“today” in Japanese
Japanese	Romanization (Wiktionary)	IPA
今日	kyō	[kõ̞ɲ̟ːit͡ɕi] (narrow) [kõ̞ɲ̟t͡ɕi] (narrow)
本日	honjitsu	[hõ̞ɲ̟d͡ʑit͡sɨ] (narrow)

今日 can function as an adverb meaning 'today' or as a noun meaning 'the current day'.

Use 本日 (honjitsu) instead of 今日 (kyō) in formal business settings, announcements or when addressing customers.

本日 is a more formal way to say today.

When using 今日 as the topic of a sentence, it is often followed by the particle は (wa), appearing as 今日は.

kyō

The greeting こんにちは (konnichiwa) is actually a truncated sentence that originally meant 'As for today, how are you?'
The word 今日 (konnichi) can sometimes be used to mean 'these days' or 'the modern era', moving far beyond the scope of a single 24-hour period.
Using the formal 本日 (honjitsu) during a casual hangout with friends can sound intentionally ironic or like a joke because it is so stiff.

今日は暑い。
It's hot today.
The sentence is useful for describing the weather using 今日.
Tatoeba #171593 by bunbuku, translation #242881 by CK
今日って暇？
Are you free today?
The sentence is useful for asking about someone's availability using 今日.
Tatoeba #8749239 by bunbuku, translation #5989791 by thomsmells
今日します。
I'll do it today.
The sentence is useful for stating an intention to do something using 今日.
Tatoeba #11052197 by small_snow, translation #10337127 by DJ_Saidez
今日はいい天気ですね。
Today is good weather, isn't it?
本日の会議はお忙しい中、ご参加いただきありがとうございます。
Thank you for attending today's meeting despite your busy schedule.
大切なイベントの当日は緊張しますね。
It's nerve-wracking on the day of an important event.
きょうは何をしますか？
What are you doing today?
1834 more sentences on Tatoeba

Misaki and Hiroto are talking about their plans for the day.

Sources

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