Spouse visa - are you married to a Japanese national or a foreign national on a working/business visa?
For the former you will have a whole slew of forms to fill out and documents to provide.
For the latter, you just need a copy of the visa that your spouse has.
remember that as the Spouse of a foreign national on a business visa you will be applying for a dependants visa and there are restrictions on the number of hours that you can work.
With a spouse visa (ie spouse of a japanese national) you can work full-time with no restrictions.
Remember to get your reentry permit at the same time (¥6,000 for multiple reentry) but this you get and pay for after your visa application has been approved.
p.s. we are not all chaps here.
