You can stay in Japan for90 days on a tourist visa.

Multiple Entry visa category allows for multiple entries into the country within a one-year validity period, with each stay limited to a maximum of 90 days at a time. It can be used for various purposes, including business affairs and is also applicable to spouses or children of Japanese nationals. This means that individuals who hold this visa can travel in and out of the country multiple times over the course of a year, making it convenient for various activities, such as business-related visits or family reunions with Japanese nationals. Each stay, however, should not exceed 90 days.

You cannot extend the validity of your visa. If you're a foreigner living in Japan and want to extend your stay, please contact the local immigration office for assistance.

You can Track your Japan visa application online using the reference number/passport number.  You can find the reference number on the receipt provided to you upon submitting your documents at the visa application center.