Yes, you can say "Domo arigato", which translates to "Thank you very much." While it is grammatically correct and widely understood globally due to pop culture references, it is actually less common in everyday native Japanese conversation than foreigners might expect. Japanese speakers typically prefer to add the polite suffix (gozaimasu) to make it arigato gozaimasu, or alternatively shorten it entirely to just domo or arigato depending on the social context.