As for the "specific activity visa" relating to the status of residence (defined activity visa), as defined by the Immigration Control Act as "activities specifically designated for individual foreigners by the Minister of Justice", by simply saying a specific activity I can not judge.
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Type of specific activity visa
Specific information processing activities
"Specific information processing activity" is one of the specific activity visas.This is a status of residence for foreigners to engage in activities related to information processing that requires knowledge or technology belonging to the fields of natural science or humanities, based on contracts with Japanese public and private institutions.
Specific research activities
"Specific research activity" is one of the specific activity visas.This is a status of residence for activities such as conducting research or research guidance in the specific field, or managing businesses related to these.
Families of Specific Studies and Specific Information Processing Visas
"Family of specific research and specific information processing visas" is one of the specific activity visas.This status of residence can be applied for by a spouse or child, or the parents of a dependent or spouse who lives with a foreigner who is engaged in specific research activities or specific information processing activities.
Construction industry specific activity visa
Construction industry specific activity visa is a visa created to respond to the growing demand for construction for the Tokyo Olympic Games, which is scheduled to be held in 2020 year, limited to 2021 year 3 month 31 days.