kouhai wa heijitsu no asa wa yappari okiruno ga nigate da.

My junior is, after all, not good at getting up on weekday mornings.

Breakdown of kouhai wa heijitsu no asa wa yappari okiruno ga nigate da.

• は: topic particle
• が: subject particle
• の: possessive case particle
• 朝あさ: morning

Questions & Answers about kouhai wa heijitsu no asa wa yappari okiruno ga nigate da.

Why are there two は particles (後輩は … 朝は)? Is that okay?

Yes. This is topic stacking.

• First 後輩は sets “as for my junior(s) …”
• Then 平日の朝は narrows it further: “as for weekday mornings …” The second は often adds a contrastive nuance: weekday mornings (as opposed to weekend mornings, etc.).

Why is it 起きるのが and not just 起きるが?

Because の nominalizes the verb phrase. 起きるの turns “to get up” into “getting up,” so it can be the subject of the adjective 苦手. The pattern is:

• X は V-の-が 好き／嫌い／得意／苦手／上手／下手 だ

Is that の the same as the explanatory の (～のだ／んだ)?

No. Here の is a nominalizer (“V-ing”). The explanatory の appears before だ/です (e.g., ～のだ／んだ) to give background or explanation. In this sentence, の is followed by が, not だ.

Could I use こと instead of の (起きることが苦手)?

You could, but V-のが苦手 is more natural in everyday speech. こと sounds more formal/abstract. With feelings/abilities like 好き／嫌い／得意／苦手, の is generally preferred in conversation.

Why is there a が after 起きるの?