I am also a Freelancer Virtual Assistant. I currently have a Client who needs someone who can speak and write Chinese and Japanese. This could be a long term position.
My Client runs an Airbnb business in Japan. We need someone who can reply to emails from potential renters. A lot of these emails are in Chinese or Japanese. You will be provided with the information for replies and training will be available.
Replying to emails could take anywhere from 1-6 hours per week depending on how many inquiries come in daily.
Also, if you are in the Kyoto, Nara or Osaka area of Japan, there is potential for you to help with the cleaning and managing of the properties.