明日の予定に関してお知らせします。
- I will inform you about tomorrow’s schedule.

明日の予定に関してお知らせします。 meaning: I will inform you about tomorrow's schedule.

⚫︎ The sentence follows a common Japanese sentence structure: Subject (implied) + Object + Verb. ⚫︎ In this case, the subject is often omitted because it's understood from the context (e.g., the speaker). ⚫︎ The basic structure can be thought of as: (I/We) + About tomorrow's schedule + inform. ⚫︎ Japanese often relies on context to determine the subject, making sentences concise.

⚫︎ The particle に marks the object of the verb in this sentence. ⚫︎ 関して (かんして) translates to "regarding," "concerning," or "about." It's a formal way of introducing the topic. ⚫︎ It is often used with a noun or noun phrase and provides a detailed information on the topic. ⚫︎ The fixed expression 〜に関して ("regarding ~") is used to introduce the topic or subject of the information that follows. ⚫︎ The expression helps clarify what the sentence is about. ⚫︎ It often indicates a more formal or detailed communication.

⚫︎ The verb お知らせします is the polite form (masu-form) of the verb お知らせする (おしらせする), which means "to inform" or "to announce." ⚫︎ お知らせします uses the masu-form to express politeness. ⚫︎ The stem of the verb is お知らせ. ⚫︎ The verb is a *suru* verb (a verb that uses the verb する to create a compound verb), making it easier to conjugate. ⚫︎ The polite form, using the "-masu" form, is a common way to express politeness in Japanese. ⚫︎ お知らせ itself is a noun that means "information" or "announcement." ⚫︎ The use of the ます form is essential to the sentence's overall tone, conveying respect.

⚫︎ 明日の (あしたの) is a noun modifying phrase, coming from the noun 明日 (あした) which means "tomorrow". ⚫︎ The particle の turns it into a modifier, showing possession or belonging, functioning here as an adjective. ⚫︎ 予定 (よてい) is a noun meaning "schedule" or "plan". ⚫︎ Therefore, 明日の予定 means "tomorrow's schedule" or "the schedule for tomorrow." ⚫︎ The combination is a noun phrase, forming the subject of the sentence along with the addition of に and 関して.

⚫︎ While not explicitly marked by a topic marker like は in this instance, the sentence implicitly follows a topic-comment structure. ⚫︎ The topic, 明日の予定 (tomorrow's schedule), is implicitly what the speaker is going to talk about. ⚫︎ The comment (what's being said about the topic) is 〜をお知らせします (I will inform you about...). ⚫︎ Understanding topic-comment structure is crucial for Japanese comprehension, even when the topic marker is omitted.