Approximate year the business was started (spouse)

Up to Wave 26

We first asked approximate year the business was started in Founding period ( - Wave 26) (spouse). In Founding period ( - Wave 26), if you answered “7. since 1989”, you are asked together with Founded year (spouse).

• Founding period ( - Wave 26) (spouse)
• Founded year (spouse)

Since Wave 27

With the advent of the Heisei Era, we have added Heisei as an option divided into 10 year increments and changed the variables

• Establishment period (Wave 27 - ) (spouse)