この試合を皮切りに彼の活躍が始まりました。
- His success began with this match.

この試合を皮切りに彼の活躍が始まりました。 meaning: His success began with this match.

⚫︎ The sentence follows a typical Japanese sentence structure: Subject - (Time/Place) - Topic Marker - Object - Verb. ⚫︎ In this case: ⚫︎ この試合を皮切りに functions as a phrase indicating the starting point (time). ⚫︎ 彼の活躍が is the subject, with the subject marker が. The subject is "his success". ⚫︎ 始まりました is the verb, "began." ⚫︎ Particles play a crucial role in understanding the relationships between words: ⚫︎ に (ni) in を皮切りに marks the starting point. ⚫︎ が (ga) marks the subject 彼の活躍. ⚫︎ を (o) is used with 皮切り indicating the object that is used to "kick off".

⚫︎ を皮切りに is a fixed expression, meaning "starting with," "beginning with," or "with the start of." It indicates that something else followed or resulted from the initial event. ⚫︎ It often suggests that the subsequent events are a continuation or development of the first event. ⚫︎ Example: この事件を皮切りに、社会不安が広がった。 (Kono jiken o kawakiri ni, shakai fuan ga hirogatta.) meaning: Social unrest spread, starting with this incident.

⚫︎ 始まりました is the past tense polite form (masu-form) of the intransitive verb 始まる (hajimaru), meaning "to begin" or "to start." ⚫︎ The base form is 始まる (hajimaru). The stem is 始まり (hajimari). ⚫︎ The polite form is made by adding ます (masu) to the stem. In the past tense, it becomes ました (mashita). ⚫︎ The intransitive verb reflects that the action happens by itself, without an actor/doer.

⚫︎ 活躍 (katsuyaku) is an adjectival noun, meaning "success," "activity," or "achievement." ⚫︎ It modifies nouns. ⚫︎ The possessive particle の (no) connects the noun 彼 (kare), "he/him," to the adjectival noun 活躍 (katsuyaku). This creates the noun phrase, 彼の活躍 (kare no katsuyaku), "his success."

⚫︎ この試合を皮切りに functions as an adverbial phrase that specifies the starting point. ⚫︎ The particle に (ni) here indicates the point in time or place.