Breakdown of keiyakusha wa seikyuubi, shiharaikigen, getsugakuryoukin, kouzafurikae, jimutesuuryou, tanmatsudaikin o kakuninsuru.
Questions & Answers about keiyakusha wa seikyuubi, shiharaikigen, getsugakuryoukin, kouzafurikae, jimutesuuryou, tanmatsudaikin o kakuninsuru.
The sentence follows this pattern:
Topic + object list + verb
- 契約者 は = as for the subscriber / the contract holder
- 請求日、支払期限、月額料金、口座振替、事務手数料、端末代金 を = the billing date, payment deadline, monthly fee, bank transfer, administrative fee, and device cost
- 確認する = check / confirm
So structurally, it is:
The subscriber checks/confirms A, B, C, D, E, and F.
は marks the topic of the sentence: what the sentence is about.
So 契約者は means something like:
- As for the subscriber, ...
- The subscriber, ...
If you used が, it would sound more like you are specifically identifying the subscriber as the one who does the action, often with a stronger focus or contrast.
In a formal written sentence like this, は is very natural because the sentence is presenting a general statement about what the subscriber does or should do.
