Hello, and congrats on your Amazon listings.
Based on your projects’ requirements, you’re right… it’s almost impossible to break this down to a non-hourly project. Notice I said, “almost.”
As a Product Description Specialist, I’ve been crafting high conversion Amazon product descriptions for quite a few years now. There’s a balance of verbally stimulating content that compels online shoppers… mixed with optimized keywords that help the A9 (Amazon algorithm) to send traffic your way… and finished with “Add to Cart” features/ benefits specifically developed for your target audience.
Based on your needs, it would be quite simple to break down each task (based on the number of ASIN’s) and pay accordingly. Truth is… if you’re dealing with someone whom understands how the Amazon algorithm works (for the Japanese market), they will do the necessary keyword research to maximize your listings… and this can take quite a while (which is why I don’t charge hourly).
If you would like to discuss how it’s possible to get your titles, bullet points, descriptions and Seller Central keywords optimized, in addition to your other needs… contact me, and we can discuss a more accurate proposal, turnaround time, etc
Best
Craig