Announcement reposted from Amazon Japan:
In order to offer Amazon customers high integrity coupons with credible discounts, with the effective date of March 19, 2024, new pricing requirements are introduced to coupons. Coupon ASINs will be temporarily excluded from a coupon if their price or discount doesn’t meet these requirements.
When coupon ASINs are suppressed due to pricing error, you will see the following error on coupon view page.
Price history issue
This ASIN doesn’t meet coupon price history requirements. ASINs are required to have a sales history before they are eligible to run on a coupon.
Increase discount
This ASIN doesn’t meet price requirements. Promotion price (buyable price - discount value) must be lower than either 1) Was Price, or 2) the recent lowest price. Increase your discount value to make this ASIN eligible.
Min/max discount issue
Coupons require a discount between minimum sale price discount% and maximum sale price discount% over your current price.