What cultural faux pas should I try to avoid making in Okinawa?

"In Okinawa, it is considered rude to point with your finger, so try to use your whole hand to gesture towards something. Avoid blowing your nose in public, as it is seen as unhygienic and disrespectful. When visiting someone's home, remember to remove your shoes before entering as a sign of respect. It's also important to avoid being loud or disruptive in public places, as Japanese culture values quiet and order. When eating, do not stick your chopsticks vertically into your rice, as this is associated with funerals. Also, avoid passing food from chopstick to chopstick, as this is another funeral-related custom. In Okinawa, it's considered impolite to refuse a drink, so if you don't want to drink alcohol, it's best to leave your glass full. Avoid discussing World War II and the Battle of Okinawa, as these are sensitive topics. Lastly, remember that tipping is not customary in Japan, and can even be seen as insulting. Instead, show your appreciation with a polite thank you," remarked another expat in Okinawa, Japan.