In our store, DHL shipping ( Super Express ) is usually "Faster and Lower price".
Express shipping (EMS) is more expensive than super express (DHL).
You may think the faster method is the most expensive but this is because in our contracted shipping costs, DHL is actually cheaper than EMS.
As a background to this thing, DHL offers flexible contract proposals based on the quantity to be shipped, but the EMS by Japan Post is only applicable to the uniform discounts.
So if you are in an area where DHL is available, it is best to choose DHL.
However, there are some areas where DHL cannot be delivered or there are some customers who do not like DHL very much by various reasons, so our store allows customers to select EMS.