HELP: filling out Yunyu Kakunin-Sho for mailing medications from Canada.

Hello, I am trying to fill out a Yunyu Kakunin-sho via the online application process, I already got two correction requests on the "invoice" (住所) field, stating the following:

The item you attached is not an import invoice. If you do not have the invoice, please ask the Customs/Int'l forwarder to issue "Naiyo Tenken Kakunin-sho" 内容点検確認書 and attach it instead of the invoice.

I am not sure what to attach at this point. So far I have tried:

  1. the invoice the pharmacy sent me (labelled "receipt") and containing
    – my address
    – my name
    – the medications, their quanitity, value, supply, names
    – the pharmacists name
    – the pharmacy address
    – amount paid
    – issuance date

  2. the shipping label, (generated by Canada Post) also containing a customs declaration.

I have not shipped the medication, as I am waiting for approval first.

Any help would be greatly appreciated, I am going to Japan in 2 weeks, and need the medications to arrive within the first week of arrival. With the upcoming holidays I am feeling quite stressed about the timeline here.

Just to clarify,
I am shipping 6 months of medication, I cannot ship in smaller increments to avoid filling out the form because the medication has already been packaged and delivered to my Canadian address. I am also not in Canada at the moment (a family member is shipping them on my behalf), nor can I go back to fetch the medications to bring them with me on my person. I also cannot easily get the medications prescribed in Japan, without running out first, even though they are not on the restricted list.

by Diligent-Debate1507