taikensanka o kikkake ni, undougutsu o katta.

direct object particle

Breakdown of taikensanka o kikkake ni, undougutsu o katta.

• 買かう: to buy
• 〜を きっかけ に: prompted by; using ... as a starting point

Questions & Answers about taikensanka o kikkake ni, undougutsu o katta.

What does 体験参加 mean here?

体験参加 is a compound noun:

• 体験 = experience, trial, trying something out
• 参加 = participation, joining

Together, 体験参加 means something like trial participation or joining something on a trial basis.

In natural English, this often refers to things like:

• attending a club activity once to try it out
• joining a class for a trial session
• taking part in an event as a beginner or guest

So it suggests the speaker tried participating in something, and that led to the later action.

Why is there を after 体験参加?

In 体験参加をきっかけに, the を is part of the grammar pattern:

• N を きっかけに
• using N as a trigger / taking N as an opportunity

So を is not marking the direct object of a verb like 買う here. Instead, it marks the thing that became the starting point or trigger for what happened next.

So:

• 体験参加をきっかけに = prompted by the trial participation / taking the trial participation as an opportunity

What does きっかけに mean?