Do I need to extend my 3-month Non-B visa after 2 months, and can I extend it by one week when it expires?

The individual seeks clarification on whether a 3-month Non-B visa requires an extension after 2 months, similar to a tourist visa, and if they can extend their visa for one additional week upon expiration. According to a comment, once you have a Non-B visa, you can apply for a yearly extension at immigration offices when you have 30 days or less remaining on your current stamp. There are no extensions available aside from the one-year option.