Hello,
I think the immediate situation looks challenging for an MBA. You’re on the older side for regular full-time MBA programs and your lack of business experience could be an issue – if not for the adcoms, for future employers. And part of what the adcom evaluates in reviewing your application is your post-MBA employability. If you can sell the adcom on how and why you’d be an attractive hire for your target firms and positions post-MBA, it will go a long way to making you a viable applicant. You should do a little research with those target firms to find out how they would view you – with your Japanese language and cultural fluency, your teaching experience (not business but does involve some relevant skills/abilities), plus MBA degree – would they consider hiring you?
Another option to consider, especially because of age, is to “plunge” into your chosen field for 2 years, establish a strong track record, then pursue an
Executive MBA.