I was under the assumption that this was baked into the fare. However, when I reviewed the documentation, I didn't see anything listed. On the HAL site, under "BEFORE YOU LEAVE" there's a link to "Pre-Pay Crew Appreciation". Their wording is a bit confusing (to me, anyway) ...
"In order to ensure that our crew are rewarded for going above and beyond-every time, we add a daily Crew Appreciation of $15.50 per guest per day for non-suite stateroom guests and $17.00 per guest per day for suite guests."
This makes it seem like it's already been added to your fare. However, the window makes it look like we still need to add this, with "ADD TO CART" and "CONTINUE TO REVIEW & BOOK".
I followed up with our TA, and they said pre-paid gratuities "will be automatically added to your ship board account when you get on the ship." Does this happen when we check-in?