Should I Buy the Futon Set from My School Dorm or Get My Own in Japan?

Hey everyone,

I recently got an email from the Tokyo Japanese Language Education Center about dormitory arrangements for students enrolling in April. They mentioned that while the dorm rooms come with beds and mattresses, we need to buy our own comforter, futon, blanket, pillow, and sheets for hygiene reasons.

They’re offering a futon set for 21,450 yen, and unless we absolutely don’t want it, there’s no need to reply to the email. If we don't want it, we have to let them know.

I’m wondering:

1. Is it worth buying this set from them? *Would it be cheaper or better quality if I buy it myself after arriving in Japan?

2. Are there any recommended places to get affordable bedding in Tokyo?

3. Also do dorms usually offer good quality bedding, or is it basic stuff?

Any advice from those who've been through this would be really helpful! Thanks in advance.