I'm not sure why an old thread was revived for this but the question posed here is misleading to begin with.
Why don't you include dollars in the translations?
Any translator/editor worth their pay will include dollars when it makes sense. However, 99% of the novels feature a Japanese person in a fantasy world so it simply won't make sense to use any currency other than the local currency and whatever the protagonist is familiar with.
In a hypothetical situation where there's a British protagonist I'm sure that expressing currency in pounds will be considered, even if the source mentions yen.