fisshingu wa fuseiakusesu no genin da.

Phishing is a cause of unauthorized access.

Breakdown of fisshingu wa fuseiakusesu no genin da.

• は: topic particle
• の: possessive case particle
• だ: to be
• 原因げにん: cause

Questions & Answers about fisshingu wa fuseiakusesu no genin da.

Why is フィッシング written in katakana?

Because フィッシング is a loanword based on English. Katakana is commonly used for foreign words, technical terms, and words that sound modern or specialized.

In this case, フィッシング usually means phishing in the cybersecurity sense, even though it is written the same way Japanese would also write fishing. The intended meaning comes from context.

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How do I read the sentence naturally?

A natural reading is:

フィッシングは ふせいアクセス の げんいん だ。
Fisshingu wa fusei akusesu no gen'in da.

Word-by-word:

• フィッシング = phishing
• は = topic marker
• 不正アクセス = unauthorized access
• の = linking particle, here meaning something like of
• 原因 = cause
• だ = plain-form is

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What does は do in this sentence?

は marks フィッシング as the topic of the sentence.

So the structure is roughly:

As for phishing, it is the cause of unauthorized access.

This does not mean は directly translates to is. Instead, it tells the listener what the sentence is about.

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